Relevant bibliographies by topics / Gamma spectrometry

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Gamma spectrometry'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 January 2023

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Journal articles on the topic "Gamma spectrometry"

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Dorozhkin, I. P., Yu V. Baklanova, and Ye V. Mustafina. "DEVELOPMENT OF FIELD SPECTROMETRY DATABASE." NNC RK Bulletin, no. 2 (October 17, 2021): 19–24. http://dx.doi.org/10.52676/1729-7885-2021-2-19-24.

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The paper considers the issues in design and development of databases for storage and processing gamma-spectrometric information. A model is presented that allows one to describe the conceptual schemes for storing and processing data obtained during field gamma-spectrometric surveys in principle and, in particular, on the territory of the Semipalatinsk test site. The possibilities of the database of field spectrometry are described. The interface for interaction between the user and the database management system has been implemented.
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Skinner, G. K. "Practical gamma-ray spectrometry." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 52, no. 3 (March 1996): 379. http://dx.doi.org/10.1016/s0584-8539(96)90113-0.

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Fedoriv, V. V. "The use of gamma-spectrometry and gamma-gamma-density logging for the study of reservoir rocks of complex structures." Prospecting and Development of Oil and Gas Fields, no. 2(67) (March 28, 2018): 41–46. http://dx.doi.org/10.31471/1993-9973-2018-2(67)-41-46.

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The results of the study of the poroperm properties of the complex structure reservoir rocks of the neogene deposits at the Letnianskyi gas condensate field are considered. The petrophysical model for determining the bulk content of the main components of oil and gas reservoirs is given by data of gamma-gamma-density logging and spectrometric gamma-logging. The petrophysical model of the joint use of the results of gamma-spectrometry and gamma-gamma-density logging is shown. As a result of data analysis, it has been established that there is a close relationship between uranium content and bulk density. It should also be noted that there is a close relationship between the solid organic matter and the thorium content. It has been shown that under the conditions of complex structure reservoirs, the complex processing of data of gamma spectrometry and gamma-gamma-density logging allows quantitatively to determine the following parameters in complex structures: clayness, porosity, content of solid organic matter and rock density.
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Shaker, Hesham H., H. Kasban, A. A. Saleh, and M. Dessouky. "Experimental investigation of the ADC sampling rate effect on the digital gamma spectrometry." Journal of Instrumentation 17, no. 09 (September 1, 2022): P09036. http://dx.doi.org/10.1088/1748-0221/17/09/p09036.

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Abstract Gamma spectrometer is not available in many laboratories because it is very expensive. Analog to digital converter ADC is the basic component of digital gamma spectrometers. The sampling rate of the ADC plays an important role in determining the performance and the cost of the gamma spectrometers. This paper investigates experimentally the ADC's sampling rate effect on the performance of the gamma spectroscopy. The conducted experiment started by sampling a real pre-amplifier output. Then, the acquired samples have been processed at different sampling rates to build the dedicated gamma spectrums. During the processing of the sampled signals, three different digital filters have been tested to distinguish their effect on the energy resolution when the sampling rate is reduced. The results of this experimental investigation will help later in proposing new low-cost and efficient gamma spectrometer prototypes.
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Mauz, Barbara, Paul J. Nolan, and Peter G. Appleby. "Technical note: Quantifying uranium-series disequilibrium in natural samples for dosimetric dating – Part 1: gamma spectrometry." Geochronology 4, no. 1 (April 14, 2022): 213–25. http://dx.doi.org/10.5194/gchron-4-213-2022.

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Abstract. Dosimetric dating techniques rely on accurate and precise determination of environmental radioactivity. Gamma spectrometry is the method of choice for determining the activity of 238U, 232Th, and 40K. With the aim to standardize gamma-spectrometric procedures for the purpose of determining accurate parent nuclide activities in natural samples, we outline the basics of gamma spectrometry and practical laboratory procedures here. This includes gamma radiation and instrumentation, sample preparation, finding the suitable measurement geometry and sample size for a given detector, and using the most suitable energy peaks in a gamma spectrum. The issue of correct efficiency calibration is highlighted. The procedures outlined are required for estimating contemporary parent nuclide activity. For estimating changing activities during burial specific data analyses are required, and these are also highlighted.
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Luca, A., P. De Felice, and G. Tanase. "Low level gamma spectrometry by beta–gamma coincidence." Applied Radiation and Isotopes 53, no. 1-2 (July 2000): 221–24. http://dx.doi.org/10.1016/s0969-8043(00)00137-8.

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Tugsavul, A., B. Kopuz, K. Cimcim, S. Can, H. Tel, and Ö. Ciftcioglu. "Gamma absorptiometric technique employing high resolution gamma spectrometry." International Journal of Applied Radiation and Isotopes 36, no. 9 (September 1985): 705–8. http://dx.doi.org/10.1016/0020-708x(85)90040-7.

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Le, Vuong Quang, Nguyen Hoang Vo, Chuong Dinh Huynh, Phuc Minh Lau, Thanh Thien Tran, and Tao Van Chau. "Study of the minimum detectable activity in gamma-ray spectrometry with various shielding configurations." Science and Technology Development Journal - Natural Sciences 1, T4 (December 31, 2017): 56–62. http://dx.doi.org/10.32508/stdjns.v1it4.496.

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In the environmental radioactivity analyzing methods using gamma-ray spectrometry, the natural activities of radionuclides were required to be higher than the minimum detectable activity (MDA). To reduce MDA, one of the popular methods is to improve the ability of reducing the background radiation of the gamma-ray spectrometry. In this work, we designed the shielding configuration with 5 cm lead and 2 mm copper (thickness of walls and top). The MDAs of gamma-ray spectrometer were 2.6–4.24 times times for 40K (1460.8 keV), 232Th (208Tl- 2614.5 keV) and 238U (214Pb- 352 keV; 214Bi- 609.3 keV, 214Bi- 1764.5 keV). In the other hand, MDA for 238U with this shielding configuration is smaller than the activity of 238U inside surface soils in Vietnam. These results showed that the gamma spectrometer with NaI(Tl) detector and this shielding configuration was suitable for measurements activity of 238U in the environmental samples.
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Стець, М. М., and М. В. Стець. "Gamma-spectrometry of transcarpathian zeolites." Scientific Herald of Uzhhorod University.Series Physics 14 (December 25, 2003): 179–87. http://dx.doi.org/10.24144/2415-8038.2003.14.179-187.

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Lépy, M. C., A. Pearce, and O. Sima. "Uncertainties in gamma-ray spectrometry." Metrologia 52, no. 3 (May 22, 2015): S123—S145. http://dx.doi.org/10.1088/0026-1394/52/3/s123.

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Dissertations / Theses on the topic "Gamma spectrometry"

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Tyler, Andrew Nicholas. "Environmental influences on gamma ray spectrometry." Thesis, University of Glasgow, 1994. http://theses.gla.ac.uk/4893/.

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Spatially representative sampling of both natural and anthropogenic deposits in the environment is limited by their inherent heterogenic distribution. This problem is compounded when trying to relate ground measurements which are spatially restricted to remote sensing observations which are not. This work examined these widely experienced problems in the context of the measurement of natural (K, U and Th) and anthropogenic ( 137Cs and ' 34Cs) radioactivity through the three techniques of soil sampling with laboratory based gamma ray spectrometry, in-situ gamma ray spectrometry, and airborne gamma ray spectrometry. These three methods were applied systematically to estimate the radioactivity across a tight geometry valley in Renfrewshire. Activity estimates from field based and airborne gamma spectrometry were compared with each other and with the results of high resolution gamma spectrometry of soil samples to examine the relationship between each method under variable topographic conditions. These results demonstrated that the distribution, and post depositional migration, of activity had important influences on all measurement techniques, and affected the ability to make comparisons between them. Further detailed studies were then conducted to examine these influences. The effects of variations in soil composition and characteristics on environmental gamma ray spectrometry were evaluated by calculation and experimental determination. Corrections to standard laboratory gamma spectrometric procedures were developed to improve systematic precisio:i. These investigations also reviewed soil sampling depth for direct effective comparison with in-situ gamma spectrometry. The effects of small scale sampling errors on activity estimates were demonstrated to have a quantifiable influence on the precision of activity estimation. Lateral variability of activity distribution of natural radioactivity and anthropogenic radioactivity deposited both from the atmosphere and from marine sources has been studied in detail at a number of sites. The extent of variability depends on the nature of activity, its deposition mode and local environmental characteristics. Spatial variability represents an important constraint on the interpretation of activity estimates derived from all methods examined, and on comparisons between them. Statistically representative sampling plans were developed and applied to enable spatial comparisons to be made between soil sample derived activity estimates and in-situ and remotely sensed observations. The influence of the vertical activity distribution on in-situ and airborne measurements has been recognised as an important variable affecting calibration. The use of the information from the scattered gamma ray spectrum to quantify and correct for source burial effects was examined in a series of modelling experiments. A relationship between 'Cs source burial and forward scattering was determined and subsequently applied to a salt marsh environment which showed pronounced subsurface maxima. A spectrally derived calibration correction coefficient was shown to account for variations in source burial across a single site. This provides a potential means for surmounting one of the principal limitations of in-situ gamma spectrometry. As a result of this work it has been possible to account for important environmental factors which affect gamma ray spectrometry in the laboratory, in the field and from aircraft. This has led to the development of sound methodology for comparison between sampling, field based and remote sensing techniques.
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Brown, Nathaniel J. "Studies in the mass 160 decay chain. gamma-ray and conversion electron spectroscopy for the 160lu-160yb, 160yb-160tm, 160tm-160er decay schemes." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/33956.

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Excited states in the transitional nucleus 160Yb have been studied using gamma-ray and conversion electron spectroscopy following the beta+/EC decay of 160Lu. Excited states in the nuclei 160Tm and 160Er have been studied following the beta+/EC decay of 160Yb and 160Tm, respectively. The data for the present study were obtained at TRIUMF in Vancouver, Canada at the ISAC-1 facility through radioactive sources moved into the combination of the 8pi gamma-ray spectrometer array and the Pentagonal Array for Conversion Electron Spectroscopy (PACES). Analysis of gamma-ray gated gamma-ray, gamma-ray gated conversion electron and conversion electron gated gamma-ray spectra resulted in the discovery of a new first excited state and the establishment of a level scheme for 160Tm which differs from the one adopted; as well as a test of the rotational characteristics of 160Er with intensity comparisons to both the spin-5 beta-decaying isomer study of by Singh et al. and the spin-parity 1- beta decay study of by Strusny et al. and Bykov et al.
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Camp, Brunés Anna. "Improvement of early warning monitoring using gamma spectrometry." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/458379.

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The present thesis is focused on the improvement of radiological surveillance networks using gamma spectrometry. Tipically they are equipped with gamma dose rate monitors, while they do not have gamma spectrometry monitors. These measure the effects of gamma radiation, but do not provide any nuclide-specific information. Nowadays new materials have been developed in the spectrometry research field and the implementation of gamma spectrometry detectors is being actively considered in European gamma-dose stations (more than 5000). In this thesis the lanthanum bromide, LaBr3(Ce), detector has been selected as the reference instrument to study the possibility of installing it in early warning networks. The reasons for its choice were its resolution, which improves from 7 % to 3 % at 662 keV, its availability and the fact that these detectors are already being used at institutions such as STUK, the nuclear safety authority in Finland. Selected monitors have been characterized by irradiation at a reference laboratory at the Institute of Energy Technologies (INTE). Furthermore, the study of their inherent background and the influence of cosmic radiation have been investigated by means of exposures in lakes, underground laboratories and the use of Monte Carlo (MC) simulations. In addition to its main function, gamma spectroscopy, these detectors allow the possibility of calculating values of ambient dose equivalent H*(10). In this thesis two different methods have been developed and applied to spectra measured using LaBr3(Ce) crystals in long-term measurements and intercomparison campaigns, the stripping method and the conversion coefficients method. The first is based on obtaining the external flux that reaches the monitor and involves the subtraction of all partial absorptions produced by scatterings in the monitor itself. This methodology, which has been already studied and usually applied to HPGe detectors, proved that it can also offer good results in LaBr3(Ce) detectors. The second methodology is based on splitting the spectra into several energy regions, and a coefficient to "convert" from measured counts to H *(10) values for each region is defined. Results obtained have been compared with classical dose rate monitor values. The long-term measurements were performed at surveillance stations in Barcelona and Madrid. Since, fortunately, there were no radiological emergencies during research for this thesis, H*(10) diurnal and seasonal variations at these stations are studied from the viewpoint of the influence of cosmic radiation and variations of 222Rn daughter concentration. Intercomparison campaigns were performed at Physikalisch-Technische Bundesanstalt (PTB) facilities to study both detector sensibility and the accuracy of H*(10) calculated values. Use of new technological advances in the determination of high levels of H*(10) led us to study the viability of installing gamma radiation detectors on an unmanned aerial vehicle. In this thesis a drone prototype has been developed which uses a 3'' x 3'' NaI installed in an RPAS helicopter. The first flights took place at different altitudes and over a pond in order to study detector sensitivity. Although the prototype it is still at an initial stage and more flights are required, preliminary results obtained are promising, showing that the system is able to detect variations in terrestrial radioactivity.
La present tesis se centra en la millora de les estacions de radiovigilància ambiental a partir de l'ús de l'espectrometria gamma. Típicament aquestes estacions estan equipades amb monitors de mesura de dosis, però no disposen d'equips d'espectrometria. Això significa que es poden prendre mesures dels efectes de la radiació, la dosis, però no es pot obtenir informació sobre els radionúclids que produeixen aquesta radiació. Avui en dia s'han desenvolupat nous materials en el camp de l'espectrometria i la implementació d'aquest tipus de detectors s'està considerant activament per part de les estacions de radiovigilància europees (més de 5000). A la tesis el detector de bromur de lantà, LaBr3(Ce), s'ha seleccionat com a instrument de referència per estudiar la viabilitat de ser instal·lat a les estacions anomenades "early warning", és a dir, que està previst donin el primer avís en cas d'emergència radiològica. Les raons d'escollir aquest detector són la seva resolució, que millora del 7 % al 3 % als 662 keV, la seva disponibilitat i el fet que aquests detectors ja s'han començat a utilitzar per institucions com l'STUK, l'autoritat de seguretat nuclear a Finlàndia. Els monitors seleccionats s'han caracteritzat mitjançant irradiacions al laboratori de referència de l'Institut de Tècniques Energètiques (INTE). També s'han realitzat estudis sobre la seva contaminació interna i la influència de la radiació còsmica a través de mesures en llacs, laboratoris subterranis i l'ús de simulacions Monte Carlo (MC). A més de la seva principal funcionalitat, l'espectrometria gamma, també tenim la possibilitat de calcular valors de dosis equivalent ambiental H*(10) a partir dels espectres registrats. En aquesta tesis dues metodologies diferents s'han desenvolupat i aplicat als espectres mesurats amb cristalls de LaBr3(Ce), en mesures de llarga durada i en campanyes d'intercomparacions: la metodologia de l'"stripping" i la de "conversion coefficients". La primera es basa en obtenir el flux real que arriba al detector i implica restar totes aquelles absorcions parcials que es produeixen per "scatterings" en el monitor mateix. Aquesta metodologia, que ja s'ha estudiat i usualment s'aplicava a detectors de HPGe, ha mostrat bons resultats també amb els detectors de LaBr3(Ce). La segona metodologia es basa en dividir l'espectre en diferents regions energètiques i definir per cadascuna d'elles un coeficient per passar de número de comptes mesurats a valors de H*(10). Els resultats obtinguts amb els dos mètodes s'han comparat amb els que proporcionaria un monitor de taxa de dosis. Les mesures de llarga durada es van dur a terme en estacions de vigilància de Barcelona i Madrid. Com que, afortunadament, no va haver-hi cap emergència radiològica mentre s'estava realitzant la tesis, les variacions diürnes i estacionals de H*(10) en aquestes estacions s'han estudiat des del punt de vista de la influència de la radiació còsmica i les variacions en la concentració dels descendents del 222Rn. Les campanyes d'intercomparació es van dur a terme a les instal·lacions del Physikalisch-Technische Bundesanstalt (PTB) per estudiar tant la sensibilitat com la precisió dels valors de H*(10) calculats. L'ús dels nous avenços tecnològics en la determinació d'alts nivells de H*(10) ens han permès estudiar la viabilitat d'instal·lar detectors gamma en vehicles aeris no tripulats. En aquesta tesis s'ha desenvolupat un prototip de dron que utilitza un detector de 3" x 3" de NaI instal·lat en un helicòpter RPAS. Els primers vols es van realitzar a diferents alçades i sobrevolant un estany per tal de veure la seva sensibilitat. Malgrat que el prototip encara es troba en una fase inicial i caldran molts més vols de prova, els resultats inicials han estat prometedors, ja que han mostrat que el sistema és sensible a les variacions de la radioactivitat natural.
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Boson, Jonas. "Improving accuracy of in situ gamma-ray spectrometry." Doctoral thesis, Umeå : Umeå University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1805.

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Xu, Jiaxin. "Development of analysis tools for gamma-ray spectrometry." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASG030.

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La spectrométrie gamma est une des techniques principales pour la mesure de la radioactivité, qui permet d'identifier et quantifier les radionucléides. L'objectif de la thèse est de développer de nouvelles méthodes d’analyse des spectres gamma afin d'améliorer les limites de détection. Dans ce contexte, la première contribution est la proposition de nouvelle approches statistiques pour l'estimation des activités en spectrométrie gamma par le démélange spectral, qui consiste à décomposer un spectre gamma mesuré en spectres individuels des radionucléides. Contrairement aux méthodes standard, cette approche permet de traiter un spectre gamma dans sa globalité et prendre en compte la statistique Poisson du processus de détection. En modélisant l'estimation des activités comme un problème inverse sous la contrainte de non-négativité, le démélange spectral parcimonieuse est étudié pour estimer conjointement l'ensemble des radionucléides actifs et leurs activités. La deuxième contribution est l'utilisation métrologique du démélange spectral étudié, qui nécessite en plus l'évaluation des limites caractéristiques pour la prise de décision et l'étalonnage des instruments pour l'analyse quantitative
Gamma-ray spectrometry is one of the main techniques used for the measurement of radioactivity, which allows identifying and quantifying radionuclides. The objective of this thesis is to develop new spectrum analysis methods to improve the detection limits. In this context, the first contribution is investigating the activity estimation in gamma-ray spectrometry with spectral unmixing, which decomposes a measured spectrum into individual radionuclides' spectra. Contrary to standard methods, this approach allows accounting for the full spectrum analysis of a gamma-ray spectrum and the Poisson statistics underlying the detection process. By formulating the activity estimation as an inverse problem under non-negativity constraint, the sparse spectral unmixing is investigated to estimate the subset of active radionuclides and their activities jointly. The second contribution is the metrological use of the investigated spectral unmixing method, which further necessitates the evaluation of characteristic limits for decision making purposes and the instruments' calibration for quantitative analysis
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Hernández, Suárez Francisco Javier. "Optimisation of environmental gamma spectrometry using Monte Carlo methods." Doctoral thesis, Uppsala University, Department of Physics, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2672.

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Dissertation in Environmental Physics to be publicly examined in Häggsalen (Ångström Laboratory), Uppsala University, on Friday, November 8, 2002 at 10:00 am for the degree of doctor of philosophy in Physics. The examination will be conducted in English.

Gamma spectrometry is one of the tools commonly used for the measurement of various environmental radionuclides. Simultaneous determination of the absolute activity of gamma emitting radiotracers in a wide range of environmental matrices and fractions necessitates proper and accurate evaluation of the sample-to-detector efficiency. Several radiotracers require, in addition, the use of sub-routines for self-absorption corrections.

Gamma spectrometry is an important and elegant tool for assessing environmental changes. Optimisation of ultra low-level gamma spectrometry for reliable assessment of such changes requires harmonisation of laboratory needs with sampling and site conditions.

Different aspects of the calculation of sample-to-detector efficiencies using empirical and Monte Carlo approaches are discussed here, including the uncertainties related to the simulation of the performance of different HPGe detectors and the effects of the incomplete collection of charges in Ge-crystals. Various simulation codes for the computation of peak efficiencies in planar and well Ge-detectors have been developed from scratch. The results of the simulations have been tested against experimental data and compared to other simulation results obtained with the Monte Carlo N-Particle code (MCNP). The construction of calibration sources with improved absorption and collimation characteristics have been, also, described in this work. These sources have been especially designed for the efficiency calibration of Ge-detectors at energies below 100 keV.

Flexible, fully tested and prototype approaches for the evaluation of self-absorption corrections, based on Monte Carlo simulations, are described. Special consideration is given to the problems related to the sample's variability in size, density and composition. Several examples of the absolute and simultaneous determination of environmental multitracers which benefited from self-absorption corrections and the optimised efficiency calibration algorithms are, also, presented and discussed. These examples include, among other things, a comprehensive analysis of the gamma spectrometry of 234Th in a wide range of matrices and the speciation of several radionuclides in sediments from a hard-water lake.

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Varley, A. L. "Bridging the capability gap in environmental gamma-ray spectrometry." Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/23320.

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Environmental gamma-ray spectroscopy provides a powerful tool that can be used in environmental monitoring given that it offers a compromise between measurement time and accuracy allowing for large areas to be surveyed quickly and relatively inexpensively. Depending on monitoring objectives, spectral information can then be analysed in real-time or post survey to characterise contamination and identify potential anomalies. Smaller volume detectors are of particular worth to environmental surveys as they can be operated in the most demanding environments. However, difficulties are encountered in the selection of an appropriate detector that is robust enough for environmental surveying yet still provides a high quality signal. Furthermore, shortcomings remain with methods employed for robust spectral processing since a number of complexities need to be overcome including: the non-linearity in detector response with source burial depth, large counting uncertainties, accounting for the heterogeneity in the natural background and unreliable methods for detector calibration. This thesis aimed to investigate the application of machine learning algorithms to environmental gamma-ray spectroscopy data to identify changes in spectral shape within large Monte Carlo calibration libraries to estimate source characteristics for unseen field results. Additionally, a 71 × 71 mm lanthanum bromide detector was tested alongside a conventional 71 × 71 mm sodium iodide to assess whether its higher energy efficiency and resolution could make it more reliable in handheld surveys. The research presented in this thesis demonstrates that machine learning algorithms could be successfully applied to noisy spectra to produce valuable source estimates. Of note, were the novel characterisation estimates made on borehole and handheld detector measurements taken from land historically contaminated with 226Ra. Through a novel combination of noise suppression and neural networks the burial depth, activity and source extent of contamination was estimated and mapped. Furthermore, it was demonstrated that Machine Learning techniques could be operated in real-time to identify hazardous 226Ra containing hot particles with much greater confidence than current deterministic approaches such as the gross counting algorithm. It was concluded that remediation of 226Ra contaminated legacy sites could be greatly improved using the methods described in this thesis. Finally, Neural Networks were also applied to estimate the activity distribution of 137Cs, derived from the nuclear industry, in an estuarine environment. Findings demonstrated the method to be theoretically sound, but practically inconclusive, given that much of the contamination at the site was buried beyond the detection limits of the method. It was generally concluded that the noise posed by intrinsic counts in the 71 × 71 mm lanthanum bromide was too substantial to make any significant improvements over a comparable sodium iodide in contamination characterisation using 1 second counts.
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Hutchinson, Jesson. "Handheld gamma-ray spectrometry for assaying radioactive materials in lungs." Thesis, Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-11102005-164303/.

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Zhang, Weihua. "Studies on anticoincidence gamma-ray spectrometry in neutron activation analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24768.pdf.

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Mubashir, Hassan. "Installation and optimization of a gamma spectrometry system in anticoincidence." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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The work covered by this thesis was carried out at the Brasimone ENEA Research Centre, the National Agency for New Technologies, Energy and Sustainable Economic Development, with the aim of optimising a gamma spectrometry system in anticoincidence for the detection of noble gases, in particular the radioactive isotopes of xenon 131mXe, 133Xe, 133mXe and 135Xe. The laboratory of the ENEA Research Center of Brasimone, where the experimental apparatus is found to carry out the measurements of 131mXe, 133Xe, 133mXe and 135Xe, collaborates constantly with the monitoring network and is able to provide, if necessary, data and analysis on noble gases. The signals produced by the interaction of cosmic rays that manage to pass the screen have been recognized as the main cause of the increase of the detector background because they give rise to the Compton continuum and, as a result, they increase the value of detectable MDA. For this reason, a system in anticoincidence has been developed through the use of two plastic scintillators, placed over the shielding of the Hpge detector, which sends pulses recording within a gate located in the germanium multichannel analyzer: at the time the signal arrives from the scintillator, the gate blocks data acquisition to avoid recording pulses generated by cosmic radiation. For both configurations of the system, therefore, both with the anti-coincidence apparatus inactive and in operation, energy, FWHM and efficiency calibrations had to be carried out using a certified multi-peak source. The solution proposed, in conclusion of the thesis, to eliminate any electronic interference with the efficiency of the detector provides for the replacement of the current electronic apparatus with a new fully digitized, made by the company CAEN, Nuclear Electronic Construction Equipment.
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Books on the topic "Gamma spectrometry"

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Practical gamma-ray spectrometry. 2nd ed. Chichester, England: Wiley, 2008.

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D, Hemingway John, ed. Practical gamma-ray spectrometry. Chichester: Wiley, 1995.

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Margaryan, Ṛ. Kh. Gamma kʻvantneri ēnergiayi chʻapʻumě aṛkaytschʻayin spektrometreri ōgtagortsmamp: Usumnakan dzeṛnark. Erevan: Erevani hamalsarani hratarakchʻutʻyun, 2006.

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Margaryan, Ṛ. Kh. Gamma kʻvantneri ēnergiayi chʻapʻumě aṛkaytschʻayin spektrometreri ōgtagortsmamp: Usumnakan dzeṛnark. Erevan: Erevani hamalsarani hratarakchʻutʻyun, 2006.

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Margaryan, Ṛ. Kh. Gamma kʻvantneri ēnergiayi chʻapʻumě aṛkaytschʻayin spektrometreri ōgtagortsmamp: Usumnakan dzeṛnark. Erevan: Erevan hamalsarani hratarakchʻutʻyun, 2006.

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G, Helmer Richard, ed. Gamma- and x-ray spectrometry with semiconductor detectors. Amsterdam: North-Holland, 1988.

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Grasty, R. L. The design, construction, and application of concrete models for calibrating borehole gamma-ray spectrometers. Ottawa, Canada: Geological Survey of Canada, 1993.

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International, School of Nuclear Physics (1991 Erice Italy). 4 [pi]-high resolution gamma-ray spectroscopy: Proceedings of the International School of Nuclear Physics, Erice, 20-29 September 1991. Oxford: Pergamon Press, 1992.

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Pitkin, James A. Gamma-ray radioactivity data, Payette National Forest, west-central Idaho. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

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Pitkin, James A. Gamma-ray radioactivity data, Payette National Forest, west-central Idaho. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

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Book chapters on the topic "Gamma spectrometry"

1

Rääf, Christopher. "Gamma Spectrometry." In Handbook of Nuclear Medicine and Molecular Imaging for Physicists, 145–73. New York: CRC Press, 2021. http://dx.doi.org/10.1201/9780429489556-8.

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Belgya, Tamás, and Zsolt Révay. "Gamma-Ray Spectrometry." In Handbook of Prompt Gamma Activation Analysis, 71–111. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-0-387-23359-8_4.

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Davydov, Andrey V. "Fundamentals of Gravitational Gamma Spectrometry." In Springer Tracts in Modern Physics, 127–40. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10524-6_4.

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Kiptily, V. G., T. Kondoh, V. O. Naidenov, I. A. Polunovski, Yu V. Tuboltsev, I. N. Chugunov, and A. E. Shevelev. "Gamma Ray Spectrometry in ITER: Conceptual Design." In Diagnostics for Experimental Thermonuclear Fusion Reactors 2, 511–19. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5353-3_62.

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Gold, Raymond, James P. McNeece, and Bruce J. Kaiser. "Advances in Continuous Gamma-Ray Spectrometry and Applications." In Reactor Dosimetry, 357–71. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5378-9_35.

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Aba, Abdulaziz, Anfal Ismaeel, Aisha Al-Boloushi, Hanadi Al-Shammari, and Omar Al-Boloushi. "Deposited Rates of Radionuclides." In Atlas of Fallen Dust in Kuwait, 140–76. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66977-5_6.

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Abstract Temporal and Spatial Distribution of Radionuclides in Dust Fallout. The depositional fluxes of the natural radionuclides (40K, 210Pb, and 7Be) and the man-made radionuclides (137Cs) have been calculated using efficiency calibrated ultra-low background gamma spectrometry in nine sampling sites covering Kuwait. Maps showing high and low concentrations of radionuclides distribution among Kuwait.
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Maučec, M., P. H. G. M. Hendriks, and R. J. de Meijer. "Monte Carlo Simulation of Natural Gamma Ray Spectrometry for Underwater Surfaces." In Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications, 773–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-18211-2_123.

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Semkow, Thomas M., Abdul J. Khan, Traci A. Menia, Xin Li, Liang T. Chu, Miguel A. Torres, and Abdul Bari. "Detection Limit for Ra-228 in Drinking Water by Gamma Spectrometry." In Detection Limits in Air Quality and Environmental Measurements, 146–61. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2019. http://dx.doi.org/10.1520/stp161820180060.

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Klusoň, J. "Monte Carlo Simulations of Photon Field Characteristics for In Situ Gamma Spectrometry Applications." In Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications, 339–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-18211-2_54.

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Gold, Raymond, William N. McElroy, Bruce J. Kaiser, and James P. McNeece. "Nondestructive Determination of Reactor Pressure Vessel Neutron Exposure by Continuous Gamma-Ray Spectrometry." In Reactor Dosimetry, 345–56. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5378-9_34.

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Conference papers on the topic "Gamma spectrometry"

1

Butterweck, Gernot, Benno Bucher, Ladislaus Rybach, Anselmo Salles Paschoa, and Friedrich Steinhäusler. "Airborne Gamma-Spectrometry in Switzerland." In THE NATURAL RADIATION ENVIRONMENT: 8th International Symposium (NRE VIII). AIP, 2008. http://dx.doi.org/10.1063/1.2991268.

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Cheng, Zhiwei. "Gamma Spectrometry Measurement for the Soil in Contaminated Fields." In ASME 2001 8th International Conference on Radioactive Waste Management and Environmental Remediation. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/icem2001-1144.

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Abstract This paper introduces a method of HPGe gamma spectrometry measurement for the soil samples collected from contaminated fields. HPGe gamma spectrometry system is equipped in a transportable laboratory, and the samples can be processed and analyzed on-site.
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Serikov, Arkady. "Shielding Analyses for Gamma Spectrometer GAMMACELL in Experiments on Neutron Generator." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49196.

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The paper is devoted to computational analysis of shielding properties of spectrometer GAMMACELL irradiated by neutrons from 14.1 MeV Neutron Generator (NG). The shielding is required to protect the BaF2 crystals of the gamma spectrometer GAMMACELL from background thermal neutrons, scattered from the walls and equipment in experimental room. GAMMACELL is a scintillation spectrometer of full gamma particles absorption. It consists of 9 BaF2 crystals; each of them has 40×40×100 mm3 dimensions and is viewed by photomultiplier tube. Neutrons also cause flashes in BaF2 crystals and give spurious pulses. The ultimate aim of the work is to simulate the severe radiation load on spectrometer GAMMACELL and to find proper radiation shield to fulfill the most favorable operating conditions for the GAMMACELL. The neutrons were generated with energy 14.1 MeV form the source on titanium–tritium target on a copper substrate. Accelerator tube makes deuteron current with spot 4 mm diameter on the target. Between the neutron source and GAMMACELL crystals collimator is placed in order to separate neutron current with particular energy and angle. The collimator is pointed to the central BaF2 crystal, counter is turned on only in case when gammas hit it. The other 8 periphery BaF2 crystals are intended for registration of Compton and annihilation gamma radiation which scattered from central crystal. The periphery crystals must be covered by lateral shielding case for protection form background radiation. It is supposed that on the basis of shielding analyses provided and data obtained in this work the real experiment on the Neutron Generator (NG) will be performed. But the experiment on NG will be not at the final destination for the results application obtained in this work, diagnostics of plasma in fusion tokamak-type reactor by means of GAMMACELL gamma spectrometry is planned. Plasma diagnostics by gamma emission from nuclear reactions on particles accelerated upon high energy during Deuterium-Tritium nuclear fusion. Resonances and thresholds in nuclear reactions reveal the value of particle energy based on registered gamma energy in GAMMACELL. High-penetrating capability of gamma quantum gives an opportunity to examine the plasma on all full depth.
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Druker, Eugene. "Airborne Gamma-ray Spectrometry - Empirical Radon Correction." In International Congress of the Brazilian Geophysical Society&Expogef. Brazilian Geophysical Society, 2019. http://dx.doi.org/10.22564/16cisbgf2019.024.

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Dodona, A., and E. Tushe. "Gamma spectrometry analyses of georadiometrical rock samples." In 5th Congress of Balkan Geophysical Society. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609-pdb.126.6279.

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Hetu, Ray J., John A. Grant, and John M. Carson. "Presentation of airborne gamma‐ray spectrometry data." In SEG Technical Program Expanded Abstracts 1992. Society of Exploration Geophysicists, 1992. http://dx.doi.org/10.1190/1.1822105.

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Liu, Zhiyuan, Feng Zhang, Qixuan Liang, Jilin Fan, and Zhen Yang. "A New Uranium Imaging Technique Based on Four-Detector LWD Natural Gamma Ray Spectrometry Logging Apparatus." In 2022 SPWLA 63rd Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2022. http://dx.doi.org/10.30632/spwla-2022-0075.

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The past decades have witnessed an outstanding growth in the volume of unconventional wells worldwide, while the rapid exploitation of unconventional hydrocarbon requires specialist techniques like logging-while-drilling (LWD). Being able to provide both total gamma rays and thorium, uranium and potassium element concentrations in different directions, the LWD azimuthal natural gamma ray spectrometry technology is helpful in evaluating reservoir geological characteristics and real-time drilling geosteering. Elemental imaging is one key breakthrough of this technology to make more sensible decisions in changing wellbore trajectory and complex strata. The key challenge of natural gamma ray spectrum imaging logging while drilling is to obtain accurate element content from low count rate natural gamma ray spectra measured while drilling. In this paper, a more precise full spectrum maximum likelihood inversion method was used instead of conventional least square analysis to calculate element content. In order to verify its superiority and universal applicability, the azimuthal gamma ray simulation spectra of formations with different radioactivity levels and element content, including high potassium, high uranium, high thorium and mixed layers of high and low radioactivity, were obtained by Monte-Carlo simulation to compare the accuracy of element content by different methods. The results showed that the new method is of statistically higher accuracy than conventional ones, especially for uranium, which has errors less than 1.5 ppm in most cases. Based on reliable spectral analysis results and a four-detector LWD azimuthal natural gamma ray spectrometer model, the accurate imaging of uranium was realized, and experimental comparison examples were obtained by simulating the process of detectors passing through two sets of different radioactive inclined strata models. Furthermore, our research further studied the influence of barite in mud for deep drilling. As the barite content in the mud increased, the error in potassium and thorium calculations increased as well, while the error in uranium results was surprisingly low and stable. As a whole, we succeeded in validating a new uranium imaging technique based on a four-detector LWD natural gamma ray spectrometry logging apparatus model and maximum likelihood estimation (MLE) spectral analysis method, the superiority of which in solving low count rate natural gamma ray spectra has been confirmed by comparative experiments in this paper.
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A. Ezhov, K. "Opportunities of quantitative interpretation of borehole gamma-spectrometry." In 5th EAGE International Scientific and Practical Conference and Exhibition on Engineering and Mining Geophysics. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609.20147261.

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DEBERTIN, KLAUS. "CORRECTIONS IN GAMMA-RAY SPECTROMETRY WITH GERMANIUM DETECTORS." In Proceedings of the 2nd International Summer School. WORLD SCIENTIFIC, 1991. http://dx.doi.org/10.1142/9789814439305_0002.

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Silveira, M. A. G., R. H. Moreira, A. L. C. de Paula, N. H. Medina, Valdir Guimaraes, José R. B. Oliveira, Kita C. D. Macario, and Frederico A. Genezini. "Natural Radiation from Soil using Gamma-Ray Spectrometry." In NUCLEAR PHYSICS 2008: XXXI Workshop on Nuclear Physics in Brazil. AIP, 2009. http://dx.doi.org/10.1063/1.3157799.

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Reports on the topic "Gamma spectrometry"

1

Ford, K., J. R. Harris, R. Shives, J. Carson, and J. Buckle. Gamma-ray spectrometry. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2008. http://dx.doi.org/10.4095/226011.

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Fortin, R. Gamma-ray spectrometry studies. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/297401.

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Decker, Karin M. EML Gamma Spectrometry Data Evaluation Program. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/1187899.

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Decker, Karin M. EML Gamma Spectrometry Data Evaluation Program. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/795423.

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Winn, W. G. Gamma-ray spectrometry of LDEF samples. Office of Scientific and Technical Information (OSTI), January 1991. http://dx.doi.org/10.2172/5637883.

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Winn, W. G. Gamma-ray spectrometry of LDEF samples. Office of Scientific and Technical Information (OSTI), December 1991. http://dx.doi.org/10.2172/10131992.

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William Quam. Cadium-Zinc-Telluride (CZT) Gamma Ray Spectrometry. Office of Scientific and Technical Information (OSTI), September 2001. http://dx.doi.org/10.2172/788884.

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Carson, J. M., P. B. Holman, K. L. Ford, J. A. Grant, and R. B K Shives. Airborne gamma ray spectrometry compilation, potassium, Ontario. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2004. http://dx.doi.org/10.4095/215457.

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Carson, J. M., P. B. Holman, K. L. Ford, J. A. Grant, and R. B K Shives. Airborne gamma ray spectrometry compilation series, Timmins, Ontario. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2002. http://dx.doi.org/10.4095/213823.

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Carson, J. M., P. B. Holman, K. L. Ford, J. A. Grant, and R. B K Shives. Airborne gamma ray spectrometry compilation, equivalent uranium, Ontario. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2004. http://dx.doi.org/10.4095/215458.

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