Log in

Relevant bibliographies by topics / Gamma-ray spectrometry / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Gamma-ray spectrometry.

Dissertations / Theses on the topic 'Gamma-ray spectrometry'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Gamma-ray spectrometry.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

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

Full text

Abstract:

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 ga

APA, Harvard, Vancouver, ISO, and other styles

2

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.

Full text

Abstract:

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 g

APA, Harvard, Vancouver, ISO, and other styles

3

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

XHIXHA, Gerti. "Advanced gamma-ray spectrometry for environmental radioactivity monitoring." Doctoral thesis, Università degli studi di Ferrara, 2012. http://hdl.handle.net/11392/2388782.

Full text

Abstract:

The environmental radioactivity monitoring programs start in the late 1950s of the 20th century following the global fallout from testing of nuclear weapons in the atmosphere, becoming a cause of concern regarding health effects. Later, the necessity of world industrialization for new energy sources led to develop national plans on electricity production from nuclear technology, initializing in this context world wide exploration for fuel minerals: uranium exploration gained a particular attention in late 1940's in USA, Canada and former USSR and in 1951 in Australia with respective national p

APA, Harvard, Vancouver, ISO, and other styles

5

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

Full text

Abstract:

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, cet

APA, Harvard, Vancouver, ISO, and other styles

6

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

Full text

Abstract:

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 i

APA, Harvard, Vancouver, ISO, and other styles

7

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/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Myers, K. J. "Onshore outcrop gamma ray spectrometry as a tool in sedimentological studies." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/47393.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Lucia, Silvio Rogério de. "Desenvolvimento de um software de espectrometria gama para análise por ativação com nêutrons utilizando o conceito de código livre." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-01122009-095027/.

Full text

Abstract:

O Laboratório de Análise por Ativação com Nêutrons (LAN) do Instituto de Pesquisas Energéticas e Nucleares (IPEN), utiliza esta técnica analítica multielementar, baseada na irradiação de uma amostra por um feixe de nêutrons oriundos de um reator nuclear, que induz a radioatividade; que é medida em um espectrômetro de raios gama, para a obtenção dos espectros de raios gama. Neste trabalho é implementado um software denominado de SAANI (Software Análise por Ativação com Nêutrons Instrumental) para análise de espectros de raios gama, desenvolvido para os usuários do laboratório LAN-IPEN, com a fi

APA, Harvard, Vancouver, ISO, and other styles

11

SHYTI, Manjola. "Calibration and performances of in-situ gamma ray spectrometer." Doctoral thesis, Università degli studi di Ferrara, 2013. http://hdl.handle.net/11392/2388864.

Full text

Abstract:

Since 1896, when Henri Becquerel discovered that penetrating radiation was given off in the radioactive decay of uranium, the studies on radioactivity have been an interest of scientific world. With the spread of nuclear technologies applied to energy, health and industrial production, the theme of environmental radioactivity monitoring increasingly is becoming important to the policies of the health public protection both national and European level. Italy is required to comply with the recommendation of the European Commission of 8 June 2000 on the application of Article 36 of the Eurato

APA, Harvard, Vancouver, ISO, and other styles

12

Bessa, Julian L. "High-resolution outcrop gamma-ray spectrometry of the Lower Lias, Southern Britain." Thesis, University of Oxford, 1995. http://ora.ox.ac.uk/objects/uuid:901bed7b-e4e5-4791-8cf1-496430f7f9b1.

Full text

Abstract:

A detailed stratigraphic analysis of the Lower Lias of southern Britain using the technique of gamma-ray spectrometry is presented. Gamma-ray data were collected, at the maximum stratigraphic resolution possible, from the Rhaetian to Pliensbachian successions exposed in southern Britain in the Bristol Channel Basin, Wessex Basin and East Midland Shelf. The data, in the form of measured gamma-ray signatures and hence geochemical profiles, is placed within a biostratigraphic framework. The outcrop gamma-ray logs collected from the Somerset coast (Rhaetian - Lower Sinemurian) can be subdivided, o

APA, Harvard, Vancouver, ISO, and other styles

13

Pracilio, Gabriella. "The utilisation of gamma ray spectrometry, a soil mapping technology, to improve dryland crop production /." Connect to this title, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0099.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

CHEN, JIANWEI. "ON-LINE INTERROGATION OF PEBBLE BED REACTOR FUEL USING PASSIVE GAMMA-RAY SPECTROMETRY." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1096255485.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Malfrait, Paul. "Temporal spectral unmixing for rapid detection of radiological events by gamma ray spectrometry." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASG055.

Full text

Abstract:

Cette thèse vise à améliorer les algorithmes de démélange de spectres gamma afin de pouvoir accélérer la détection d'anomalie et l'estimation des contributions des radionucléides contenus dans les filtres aérosols analysés par l'Institut de Radioprotection et de Sûreté Nucléaire. Pour ce faire nous avons développé un algorithme de démélange de spectre qui analyse conjointement plusieurs mesures successives d'un même échantillon.Cet algorithme a ensuite été amélioré afin de pouvoir mener l'analyse en temps réel pendant que la mesure du spectre gamma est réalisée. Divers outils ont dû être dével

APA, Harvard, Vancouver, ISO, and other styles

16

Holmes, Jennifer L. "Radioanalytical techniques applied to environmental chemistry : a two case study /." Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/8527.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Casanovas, Alegre Ramon. "Development and calibration of automatic real-time environmental radioactivity monitors using gamma-ray spectrometry." Doctoral thesis, Universitat Rovira i Virgili, 2014. http://hdl.handle.net/10803/145442.

Full text

Abstract:

This doctoral thesis presents a collection of six scientific papers, which have been published in peer-reviewed scientific journals, in the field of real-time environmental radioactivity detection. After the contributions of this thesis, the automatic real-time environmental radiation surveillance network of Catalonia provides new and better radiological information. This was achieved thanks to the development and calibration of three types of radioactivity monitors using gamma-ray spectrometry, either with NaI(Tl) or LaBr3(Ce) detectors, which permit the real-time identification and quantific

APA, Harvard, Vancouver, ISO, and other styles

18

Allyson, Julian David. "Environmental gamma-ray spectrometry : simulation of absolute calibration of in-situ and airborne spectrometers for natural and anthropogenic sources." Thesis, University of Glasgow, 1994. http://theses.gla.ac.uk/2028/.

Full text

Abstract:

The purpose of this work is to investigate experimentally and theoretically a range of problems encountered in calibration of -ray spectrometers (converting count rates to radioelement ground concentrations), for the natural and manmade radionuclides. For in-situ and aerial survey measurements, the form of radionuclide deposition with soil depth, aerial survey altitude, and detector spectral responses are important considerations when calibrating detector systems. A modification of spectral shape is apparent, owing to scattering and attenuation in the soil and air path between source and detec

APA, Harvard, Vancouver, ISO, and other styles

19

Richardson, Paul Douglas. "Pluton zonation unveiled by gamma ray spectrometry and magnetic susceptibility : the Sheeprock granite, western, Utah /." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd614.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Bordas, Mariano. "Possibilites offertes par l'utilisation simultanee des methodes pixe (particle induces x-ray emission) et pige (particle induced gamma-ray emission) en analyse elementaire." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Al-Sulaiti, Huda Abdulrahman. "Determination of natural radioactivity levels in the State of Qatar using high-resolution gamma-ray spectrometry." Thesis, University of Surrey, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543271.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Magnusson, Åke. "The relationship between airborne gamma-ray spectrometry data and soil moisture in forested areas of Sweden." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-137931.

Full text

Abstract:

Measurements and estimations of soil water content are essential information in many differentfields, however, methods for deriving such data are often limited due to scale/spatial resolution, cost and time efficiency, or the presence of a vegetation cover. This thesis examined the relationship between airborne gamma-ray spectrometry (AGRS) data and soil water content in forested areas. In addition, it assessed the feasibility of using AGRS data to predict relative soil moisture for forestry related applications. The study utilized topography-based models, databased on aerial photography, and

APA, Harvard, Vancouver, ISO, and other styles

23

Valaparla, Sunil K. "Experimental study of the response of semiconductor detectors for EDXRF analysis." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Bajoga, Abubakar D. "Evaluation of natural and anthropogenic radioactivity in environmental samples from Kuwait using high-resolution gamma-ray spectrometry." Thesis, University of Surrey, 2016. http://epubs.surrey.ac.uk/809932/.

Full text

Abstract:

A study of natural radioactivity from ninety different soil samples across the state of Kuwait was carried out with a view to ascertain the level of natural and/or man-made radioactivity from that area. There has been some concern on the levels of NORM following the First Gulf War in which approximately 300 tons of depleted uranium shells were used and in particular, whether it has a significant impact in the surrounding environment. This study uses gamma-spectroscopy in a low background measuring system employing a high resolution Hyper-Pure Germanium detector. The calculated specific activit

APA, Harvard, Vancouver, ISO, and other styles

25

Barta, Meredith Brooke. "Nanocomposite glass-ceramic scintillators for radiation spectroscopy." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45851.

Full text

Abstract:

In recent years, the United States Departments of Homeland Security (DHS) and Customs and Border Protection (CBP) have been charged with the task of scanning every cargo container crossing domestic borders for illicit radioactive material. This is accomplished by using gamma-ray detection systems capable of discriminating between non-threatening radioisotopes, such as Cs-137, which is often used in nuclear medicine, and fissile material, such as U-238, that can be used to make nuclear weapons or "dirty" bombs. Scintillation detector systems, specifically thallium-doped sodium iodide (NaI(Tl))

APA, Harvard, Vancouver, ISO, and other styles

26

Maibane, Kutullo Freedom. "Validation of Gamma Ray spectrometry process used to determine the Radionuclides and radioactivity levels in decorative granite countertops." University of the Western Cape, 2016. http://hdl.handle.net/11394/5876.

Full text

Abstract:

Magister Scientiae - MSc (Physics)<br>Humans are continuously exposed to low level of ionizing radiation, sources include soil, medical treatment and as well as radiation emissions from natural materials like granite rocks. The radiation levels present in these granite rocks varies depending on the mineral properties and their origins. The aim of this study is to assess the radiation levels in various granite countertops available commercially in South Africa. The radiation levels present in the granite countertop samples were determined using the available low-background HPGe gamma-ray

APA, Harvard, Vancouver, ISO, and other styles

27

Burns, Kimberly Ann. "Coupled multi-group neutron photon transport for the simulation of high-resolution gamma-ray spectroscopy applications." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29737.

Full text

Abstract:

Thesis (Ph.D)--Mechanical Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Hertel, Nolan; Committee Member: Kulp, William David; Committee Member: Lee, Eva; Committee Member: Pagh, Richard; Committee Member: Petrovic, Bojan; Committee Member: Rahnema, Farzad; Committee Member: Smith, Eric; Committee Member: Wang, Chris. Part of the SMARTech Electronic Thesis and Dissertation Collection.

APA, Harvard, Vancouver, ISO, and other styles

28

Struwe, Harald. "Spectrometry for the assessment of uranium contamination in buildings." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/8693.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Richardson, Paul D. "Pluton Zonation Unveiled by Gamma-ray Spectrometry and Magnetic Susceptibility; A Case Study of the Sheeprock Granite, Western, Utah." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/209.

Full text

Abstract:

A radiometric survey of the zoned 21 Ma, A-type Sheeprock granite, western Utah, combined with measurements of magnetic susceptibility and field observations were analyzed using a geographic information system. The intrusion spans 25 square km and is roughly eliptical in shape with its long axis trending northwest. Concentration maps (composed of more than 500 survey stations) of eU, eTh, texture, magnetic susceptibility, color, and joint density help to constrain magmatic and post-magmatic processes related to its chemical and physical zonation. Uranium ranges from 3.9 to 26.9 ppm (mean 12.7)

APA, Harvard, Vancouver, ISO, and other styles

30

Marks, Alan Stephen. "Remote sensing of the regolith, Shoalwater Bay area, Queensland." Thesis, Canberra, ACT : The Australian National University, 1993. http://hdl.handle.net/1885/140068.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Titus, Nortin P. "Response of NaI(T1) detectors in geophysical applications." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50441.

Full text

Abstract:

Thesis (MSc)--Stellenbosch University, 2005.<br>Some digitised pages may appear illegible due to the condition of the original hard copy.<br>ENGLISH ABSTRACT: Airborne gamma-ray spectrometry is used for exploration and environmental monitoring over large areas. Such datasets of 7-ray are acquired using large 16l NaI(T1) detector crystals mounted in an aircraft. The response of these detectors to naturally occurring radioactive isotopes is a function of detector volume, efficiency and resolution. This response is modelled using the Monte Carlo method. A photon-electron transport computer c

APA, Harvard, Vancouver, ISO, and other styles

32

Dursun, Serkan. "Nuclear structure of the N=88 isotones: the decay of 156Tm to 156Er." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37155.

Full text

Abstract:

The N=88 nuclei lie in a transitional region of the nuclear chart. Collective structure and nuclear deformation for this region is commonly occurring. Previously, some of the nuclei having 88 neutrons have been well studied, e.g., 148Nd, 150Sm, 152Gd, 154Dy; however, 156Er has not. To be able to understand the nuclei in this region one needs to extract all the systematics of these deformed nuclei and the relations between them. The structure of 156Er is the main focus in this thesis and the work seeks understanding of the N=88 nuclei and systematics among them. To accomplish this task, 156Tm t

APA, Harvard, Vancouver, ISO, and other styles

33

Kastlander, Johan. "In situ measurements of radionuclide concentration in soil : An investigation into detector properties and methods." Doctoral thesis, Stockholms universitet, Fysikum, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-47398.

Full text

Abstract:

In case of a release of radioactive nuclides into the environment it is necessary to have reliable methods to estimate the potential effect on people and the ecosystem. In this context the total activity deposited, the elemental composition and the depth distribution are of importance. An efficient in situ method to estimate the average contamination over larger areas using high purity germanium (HPGe) detectors has been developed. The method combines simulation of photon transport with measured detector properties. The total activity of 137Cs determined from gamma-ray spectra recorded in sit

APA, Harvard, Vancouver, ISO, and other styles

34

Reinhardt, Nadja [Verfasser], and Ludger [Akademischer Betreuer] Hermann. "Gamma-ray spectrometry as auxiliary information for soil mapping and its application in research for development / Nadja Reinhardt ; Betreuer: Ludger Hermann." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2019. http://d-nb.info/1198308192/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Prieto, Butillé Elena. "Adecuación y desarrollo de métodos de análisis de datos obtenidos mediante espectrometría gamma para la medida de la radiactividad ambiental en tiempo real." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/461883.

Full text

Abstract:

La Xarxa de Vigilància Radiològica Ambiental de la Generalitat de Catalunya està constituïda per diversos tipus de detectors per a la mesura automàtica en continu i en temps real de la radiació ambiental. Entre ells destaquen els monitors d’espectrometria gamma amb detectors d’escintil•lació de NaI (Tl) i LaBr3 (Ce). Les mesures ambientals registrades amb monitors d'espectrometria gamma en temps real no tenen significat radiològic fins que se sotmeten a processos d'adequació. Aquests processos comprenen l'estabilització d'espectres, els calibratges del monitor en energia, resolució i eficiè

APA, Harvard, Vancouver, ISO, and other styles

36

Barbosa, Eder Queiroz [UNESP]. "Calibração de detectores cintiladores e sua aplicação em medidas radiométricas." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/151412.

Full text

Abstract:

Submitted by EDER QUEIROZ BARBOSA (ederqb_eaunesp@hotmail.com) on 2017-08-25T17:41:03Z No. of bitstreams: 1 DISSERTACAO MESTRADO BARBOSA, E. Q. FINAL CORRIGIDA.pdf: 9658662 bytes, checksum: 8ed25992d35956a209ef71c55c30f430 (MD5)<br>Approved for entry into archive by Monique Sasaki (sayumi_sasaki@hotmail.com) on 2017-08-25T17:57:43Z (GMT) No. of bitstreams: 1 barbosa_eq_me_rcla.pdf: 9658662 bytes, checksum: 8ed25992d35956a209ef71c55c30f430 (MD5)<br>Made available in DSpace on 2017-08-25T17:57:43Z (GMT). No. of bitstreams: 1 barbosa_eq_me_rcla.pdf: 9658662 bytes, checksum: 8ed25992d35956a209

APA, Harvard, Vancouver, ISO, and other styles

37

Arine, Bruno Burini Robles. "Melhoramento do índice de detecções na espectrometria gama em amostras ambientais usando inteligência artificial /." Sorocaba, 2017. http://hdl.handle.net/11449/148825.

Full text

Abstract:

Orientador: Antonio Cesar Germano Martins<br>Resumo: A utilização de elementos radioativos se estende hoje a diversos ramos da ciência e tecnologia, exigindo maneiras eficientes, precisas e sustentáveis de monitoramento para a preservação ambiental e a saúde humana. Uma técnica eficiente e não-destrutiva de análise de elementos emissores de raios gama é a espectrometria gama. No entanto, os softwares atuais de análise se deparam com certos empecilhos quando tratam de amostras ambientais, cujas concentrações de radioatividade são próximas do limite de detecção, ou quando certos radionuclídeos d

APA, Harvard, Vancouver, ISO, and other styles

38

Cavallaro, Francisco de Assis. "As tecnicas NASVD e MNF e sua aplicação na redução de ruidos em dados gamaespectrometricos : Francisco de Assis Cavallaro." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287723.

Full text

Abstract:

Orientadores: Rodrigo de Souza Portugal, Adalene Moreira Silva<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias<br>Made available in DSpace on 2018-08-11T23:11:38Z (GMT). No. of bitstreams: 1 Cavallaro_FranciscodeAssis_M.pdf: 3169392 bytes, checksum: 102911624b422474e306cc2cb62cdabd (MD5) Previous issue date: 2008<br>Resumo: O processamento atual em gamaespectrometria necessita de novas ferramentas para auxiliar a remoção de ruídos, visto que ao final desta etapa há constatação de ruído remanescente. O ruído remanescente prejudica de forma expressiva os

APA, Harvard, Vancouver, ISO, and other styles

39

Carlos, Dionisio Uendro. ""Desenvolvimento e construção de blocos de concreto radioativo para a calibração de espectrômetros gama portáteis e aerotransportados, utilizados em exploração mineral e de hidrocarbonetos"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/14/14132/tde-31052006-085228/.

Full text

Abstract:

Oito blocos transportáveis para calibração foram construídos para serem utilizados como padrões de concentração na calibração de espectrômetros gama portáteis e aerotransportados. Todo o procedimento de construção é descrito em detalhe. Os blocos, com dimensões de 1 m x 1 m x 0,30 m e massas variando entre 593 kg e 673 kg, devem a sua radioatividade à adição de diferentes quantidades de feldspato potássico (ortoclásio), caldasito e areia monazítica à massa de concreto. As concentrações de potássio, urânio e tório variam significativamente de um bloco para outro atingindo valores máximos de 5,

APA, Harvard, Vancouver, ISO, and other styles

40

Neddermann, Till [Verfasser], Claus [Akademischer Betreuer] Gößling, and Kai [Gutachter] Zuber. "Material screening by means of low-level gamma ray spectrometry with the Dortmund Low Background HPGe Facility / Till Neddermann. Betreuer: Claus Gößling. Gutachter: Kai Zuber." Dortmund : Universitätsbibliothek Dortmund, 2014. http://d-nb.info/1106257510/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Uchoa, Juliane Cristina Ferreira. "Analise espacial dos corpos plutonicos do cinturão mineiro atraves da integração de dados geologicos, aerogeofisicos e geoquimicos." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287404.

Full text

Abstract:

Orientadores: Adalene Moreira Silva, Catarina Laboure Benfica Toledo<br>Acompanha um mapa em folha dobrada, em bolso<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias<br>Made available in DSpace on 2018-08-08T09:59:00Z (GMT). No. of bitstreams: 1 Uchoa_JulianeCristinaFerreira_M.pdf: 8036278 bytes, checksum: 36166e7fe3b84772aa3a19765949fae4 (MD5) Previous issue date: 2006<br>Resumo: A aquisição de dados aerogeofísicos sobre o Cinturão Mineiro, porção sul do Craton São Francisco, Minas Gerais, exibiu padrões diferentes daqueles mapeados em trabalhos de cam

APA, Harvard, Vancouver, ISO, and other styles

42

Leite, Rafael Valadares. "Desenvolvimento de um espectrômetro nuclear digital de radiação gama." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3139/tde-08032007-175805/.

Full text

Abstract:

O método nuclear gamaespectrométrico vem ganhando espaço em diversas aplicações como fornecer a informação médica em um paciente ou de uma galáxia distante, detectar radioatividade para fins de segurança e medir a concentração de radioelementos em um mineral ou rocha. Esta dissertação apresenta um projeto e implementação de um espectrômetro gama digital conectado a um conjunto detector contendo cristal cintilador de iodeto de sódio dopado com tálio. O hardware é baseado em um dispositivo lógico programável da família CoolRunner II da Xilinx e um conversor analógico-digital de 80 MHz da Analog

APA, Harvard, Vancouver, ISO, and other styles

43

Magalhães, Luciola Alves 1981. "Caracterização espectral de macro e microexsudações de hidrocarbonetos em bacias continentais brasileiras." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/286641.

Full text

Abstract:

Orientador: Carlos Roberto de Souza Filho<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Geociências<br>Made available in DSpace on 2018-08-26T21:42:34Z (GMT). No. of bitstreams: 1 Magalhaes_LuciolaAlves_D.pdf: 18006745 bytes, checksum: e07ddabc39328486a6c0a93b03caf806 (MD5) Previous issue date: 2015<br>Resumo: Os reservatórios de petróleo são insuficientemente selados, permitindo escapes de fluidos que atingem a superfície e formam exsudações. As exsudações de hidrocarbonetos (HCs) gasosos são, muitas vezes, visualmente imperceptíveis. Porém, alteram o pH e o Eh do me

APA, Harvard, Vancouver, ISO, and other styles

44

Král, Dušan. "Studium využití thoria v jaderných reaktorech řízených urychlovačem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318864.

Full text

Abstract:

This thesis deals with the idea of using accelerator driven systems for thorium transmutation into the fissile material, which can be utilized in the accelerator driven systems and in thermal nuclear reactors. Thorium occurs on Earth only in fertile isotope Th-232. It can be converted to fissile U-233 by neutron capture and subsequent beta decay. The experimental part handles the data measured by the irradiation of four thorium samples by the secondary neutrons in the QUINTA spallation target, which was irradiated with 660~MeV protons. Reaction rates for the fission and spallation products wer

APA, Harvard, Vancouver, ISO, and other styles

45

Jahnke, Viktor. "Medidas das seções de choque de ionização da camada K de Au e Bi por impacto de elétrons." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-08032013-123636/.

Full text

Abstract:

Mediu-se a seção de choque de ionização da camada K de átomos de Au e Bi por impacto de elétrons com energias entre os respectivos potenciais de ionização (80 e 90 keV) e 100 keV. Filmes finos de Au e Bi, evaporados em suportes de filmes finos de C, foram posicionados numa câmara de vácuo perpendicularmente ao feixe de elétrons do sistema injetor do Mícrotron da Universidade de São Paulo, Brasil. Os raios x emitidos num ângulo de 120 graus em relação à direção do feixe de elétrons foram observados com um detetor de HPGe planar, cuja eficiência total de pico foi determinada com fontes radioativ

APA, Harvard, Vancouver, ISO, and other styles

46

Máduar, Marcelo Francis. "Desenvolvimento de um código computacional aberto de análise quantitativa para determinação de radionuclídeos por espectrometria gama com detectores semicondutores." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-12082011-150805/.

Full text

Abstract:

A quantificação da atividade de radionuclídeos emissores de raios gama em amostras medidas por espectrometria gama com detectores HPGe depende da análise dos fotopicos presentes no espectro, especialmente da determinação exata das suas áreas líquidas. Tal análise é geralmente realizada com o auxílio de ferramentas de software proprietário. Este trabalho apresenta uma metodologia, descrição de algoritmos e um aplicativo de código aberto, denominado OpenGamma, para a busca e análise de fotopicos a fim de se obter seus parâmetros relevantes e as atividades dos radionuclídeos na amostra. A impleme

APA, Harvard, Vancouver, ISO, and other styles

47

This, Kélian. "Extraction semi-paramétrique de l’information issue de spectres gamma." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG003.

Full text

Abstract:

La spectrométrie gamma est une technique de mesure nucléaire répandue qui peut être utilisée pour détecter une source radioactive, identifier sa composition et quantifier son activité.Un spectre constitue un résultat de mesure brut qui n’est pas interprétable directement. L’analyse du spectre permet d’en extraire l’information utile.Pour répondre à la croissance du besoin de mesures, nous proposons dans ce mémoire une méthode automatique d’analyse des spectres, appelée Model based Full Spectrum Analysis (MFSA), qui permet d’unifier la résolution des différents problèmes d’analyse de spectre.

APA, Harvard, Vancouver, ISO, and other styles

48

Degrelle, Deborah. "Caractérisation numérique de la technique de spectrométrie gamma par simulation Monte-Carlo. Application à la datation d'échantillons envrionnementaux." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD004/document.

Full text

Abstract:

Caractérisation numérique de la technique de spectrométrie gamma par simulation Monte-Carlo : Application à la datation d'échantillons environnementaux.Résumé :Afin d'optimiser la détermination de l'activité d'échantillons environnementaux, l'étalonnage en efficacité de la chaîne spectrométrique se doit d'être de bonne qualité. Le travail de cette thèse consiste à rassembler les problématiques principales : les phénomènes d'auto-absorption et de coïncidence. Ces effets sont traités par métrologie et simulation Monte-Carlo (MCNP6), impliquant la bonne modélisation préalable de nos détecteurs. L

APA, Harvard, Vancouver, ISO, and other styles

49

Zeman, Miroslav. "Experimentální výzkum urychlovačem řízených jaderných reaktorů pro thoriovou jadernou energetiku." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221267.

Full text

Abstract:

The Master Thesis deals with the use of thorium nuclear fuel in accelerator driven systems. Basic principle of ADS, present situation and future possibilities are described in this work. The main goal of the work is determination of neutron flux in spallation target QUINTA. In December 2013, an experiment was performed at Joint Institute for Nuclear Research, Dubna. Samples of cobalt, situated at different positions in QUINTA target, were irradiated in secondary neutron field generated by deuteron beam of energies 2 AGeV and 4 AGeV and beam of C-12 with energy 2 AGeV. The samples were measured

APA, Harvard, Vancouver, ISO, and other styles

50

Erramli, Hassane. "Développement des techniques de dosimétrie appliquées à la datation par thermoluminescence." Clermont-Ferrand 2, 1986. http://www.theses.fr/1986CLF21045.

Full text

Abstract:

Étude de la dosimétrie des rayonnements d'origine naturelle dans laquelle duex composantes peuvent être distinguées. Dose interne apportée par les rayonnements de faible parcours issus de l'échantillon considéré. Dose externe apportée par les rayonnements de grand pouvoir de pénétration et provenent de l'environnement de l'échantillon. Deux techniques sont traitées en détail: Dosimétrie thermoluminescents et spectrométrie gamma de terrain. Corrections liées à l'environnement et aux conditions d'emploi

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!