Bibliografie tematiche / Neutrons

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Letteratura scientifica selezionata sul tema "Neutrons"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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Articoli di riviste sul tema "Neutrons"

1

SAHU, SARIRA. "MULTI-GeV NEUTRINOS DUE TO $n\bar n$ OSCILLATION IN GAMMA-RAY BURST FIREBALLS." Modern Physics Letters A 22, no. 40 (2007): 3065–72. http://dx.doi.org/10.1142/s021773230702378x.

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The long and short gamma-ray bursts are believed to be produced due to collapse of massive stars and merger of compact binaries respectively. All these objects are rich in neutron and the jet outflow from these objects must have a neutron component in it. By postulating the [Formula: see text] oscillation in the gamma-ray burst fireball, we show that, 19–38 GeV neutrinos and anti-neutrinos can be produced due to annihilation of anti-neutrons with the background neutrons. These neutrinos and anti-neutrinos will be produced before the 5–10 GeV neutrinos due to dynamical decoupling of neutrons fr
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2

Daywitt, William C. "The Neutrino Decay of the Free Neutron and the Neutrino Structure According to the Planck Vacuum Theory." European Journal of Engineering and Technology Research 6, no. 5 (2021): 73–75. http://dx.doi.org/10.24018/ejers.2021.6.5.2524.

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 The Planck vacuum (PV) theory derives equations for the neutrino and antineutrino, and relates them to the unstable free neutron and antineutron. Remarkably, these neu- trons and neutrinos share the same wavefunction solutions that describe the proton and electron and their antiparticle cores.
 The neutrino and antineutrino are chargeless and massless; so their propagation through matter goes unnoticed, making these neutrinos invisible. The equations to follow that describe these pseudo-particles are the theoretical embodiment of the circa 1930 Pauli neutrino hypothes
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Daywitt, William C. "The Neutrino Decay of the Free Neutron and the Neutrino Structure According to the Planck Vacuum Theory." European Journal of Engineering and Technology Research 6, no. 5 (2021): 73–75. http://dx.doi.org/10.24018/ejeng.2021.6.5.2524.

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Abstract (sommario):

 
 
 The Planck vacuum (PV) theory derives equations for the neutrino and antineutrino, and relates them to the unstable free neutron and antineutron. Remarkably, these neu- trons and neutrinos share the same wavefunction solutions that describe the proton and electron and their antiparticle cores.
 The neutrino and antineutrino are chargeless and massless; so their propagation through matter goes unnoticed, making these neutrinos invisible. The equations to follow that describe these pseudo-particles are the theoretical embodiment of the circa 1930 Pauli neutrino hypothes
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Bondar, Aleksandr, Alexey Buzulutskov, Aleksandr Burdakov, et al. "Proposal for Neutron Scattering Systems for Calibration of Dark Matter Search and Low-Energy Neutrino Detectors." Siberian Journal of Physics 8, no. 3 (2013): 27–38. http://dx.doi.org/10.54362/1818-7919-2013-8-3-27-38.

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The proposal of two neutron scattering systems for calibration of two-phase cryogenic avalanche detectors with high sensitivity being developed at Budker INP is presented. This kind of detectors is designed for the search of dark matter and low energy neutrino detection, in particular, coherent neutrino scattering on nuclei. Detector calibration is made with a measurement of ionization yield and scintillation quenching factor for low energy recoiling nuclei (in 0.5 to 100 keV range) originating from elastic scattering of neutrons. To provide wide range of recoiling nuclei energies two systems
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Chakraborty, Sabyasachi, Aritra Gupta, and Miguel Vanvlasselaer. "Anomaly induced cooling of neutron stars: a Standard Model contribution." Journal of Cosmology and Astroparticle Physics 2023, no. 10 (2023): 030. http://dx.doi.org/10.1088/1475-7516/2023/10/030.

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Abstract Young neutron stars cool via the emission of neutrinos from their core. A precise understanding of all the different processes producing neutrinos in the hot and degenerate matter is essential for assessing the cooling rate of such stars. The main Standard Model processes contributing to this effect are ν bremsstrahlung, mURCA among others. In this paper, we investigate another Standard Model process initiated by the Wess-Zumino-Witten term, leading to the emission of neutrino pairs via Nγ → Nνν̅. We find that for proto-neutron stars, such processes with degenerate neutrons can be com
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Aitkulov, M. T., D. S. Dyussambayev, N. K. Romanova, et al. "Measurement of the spatial-energy distribution of neutrons in the irradiation channel of the critical facility." Journal of Physics: Conference Series 2155, no. 1 (2022): 012021. http://dx.doi.org/10.1088/1742-6596/2155/1/012021.

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Abstract One of the basic installations of the Republican State Enterprise “Institute of Nuclear Physics” of the Ministry of Energy of the Republic of Kazakhstan is a critical assembly, which is a zero-power reactor. Desalinated water and beryllium serve as moderators and neutrons reflectors. The energy spectrum of neutrons in the core is thermal. The main purpose and area of application is the modeling and study of the neutronic characteristics of the cores of water-moderated research reactors of various types. The paper presents the results of experimental measurements of the spatial-energy
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Hargrove, C. K., and D. J. Paterson. "Solar-neutrino neutral-current detection methods in the Sudbury neutrino observatory." Canadian Journal of Physics 69, no. 11 (1991): 1309–16. http://dx.doi.org/10.1139/p91-196.

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The Sudbury Neutrino Observatory will study the solar-neutrino problem through the detection of charged-current (CC), neutral-current (NC), and elastic-scattering (ES) interactions of solar neutrinos with heavy water. The measurement of the NC rate relative to the CC rate provides a nearly model-independent method of observing neutrino oscillations. The NC interaction breaks up the deuteron producing a neutron and a proton. The interaction rate in the original design is measured by observing Čerenkov light from showers produced by neutron-capture γ rays from the capture of the NC neutrons by a
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Mangan, M. A., C. L. Ruiz, G. W. Cooper, G. A. Chandler, and D. J. Ampleford. "Inferring neutron yields using indium activation samples for small fractions of tritium added to deuterium fuel in inertial confinement fusion (ICF) experiments." Review of Scientific Instruments 93, no. 10 (2022): 103514. http://dx.doi.org/10.1063/5.0101823.

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In inertial confinement fusion experiments, the neutron yield is an important metric for thermonuclear fusion performance. Neutron activation diagnostics can be used to infer neutron yields. The material used for neutron activation diagnostic undergoes a threshold reaction so that only neutrons having energies above the threshold energy are observed. For thermonuclear experiments using deuterium (D) and tritium (T) fuel constituents, neutrons arising from D + D reactions (DD-neutrons) and neutrons resulting from D + T reactions (DT-neutrons) are of primary interest. Indium has two neutron acti
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Shinoki, Masataka. "Measurement of cosmogenic neutron production in SK-Gd." Journal of Physics: Conference Series 2156, no. 1 (2021): 012187. http://dx.doi.org/10.1088/1742-6596/2156/1/012187.

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Abstract The Super-Kamiokande-Gd (SK-Gd) experiment has started after adding the gadolinium (Gd) into ultra-pure water in the SK detector. SK-Gd dramatically improves the sensitivity to supernova relic neutrino searches by tagging neutrons. Cosmic-ray muons penetrating into the SK detector induce hadronic showers. Such muon often break oxygen nuclei in water and produce unstable radioactive isotopes and neutrons, which are major background sources for supernova relic neutrino searches. On the other hand, the cosmogenic neutrons produced by muons can be used for the detector calibration source.
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Biekert, A., C. Chang, L. Chaplinsky, et al. "A portable and monoenergetic 24 keV neutron source based on 124Sb-9Be photoneutrons and an iron filter." Journal of Instrumentation 18, no. 07 (2023): P07018. http://dx.doi.org/10.1088/1748-0221/18/07/p07018.

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Abstract A portable monoenergetic 24 keV neutron source based on the 124Sb-9Be photoneutron reaction and an iron filter has been constructed and characterized. The coincidence of the neutron energy from SbBe and the low interaction cross-section with iron (mean free path up to 29 cm) makes pure iron specially suited to shield against gamma rays from 124Sb decays while letting through the neutrons. To increase the 124Sb activity and thus the neutron flux, a >1 GBq 124Sb source was produced by irradiating a natural Sb metal pellet with a high flux of thermal neutrons in a nuclear reactor. The
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Tesi sul tema "Neutrons"

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Moore, Brian Randolph. "A neutronic study of an intense epithermal neutron source based on the ⁹BE(P,N) ⁹B reaction for neutron capture therapy." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/16364.

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Heinrich, Aaron David. "Delayed neutrons from the neutron irradiation of ²³⁵U." Texas A&M University, 2008. http://hdl.handle.net/1969.1/85943.

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A series of experiments was performed with the Texas A&M University Nuclear Science Center Reactor (NSCR) to verify ²³⁵U delayed neutron emission rates. A custom device was created to accurately measure a sample's pneumatic flight time and the Nuclear Science Center's (NSC's) pneumatic transfer system (PTS) was redesigned to reduce a sample's pneumatic flight time from over 1,600 milliseconds to less than 450 milliseconds. Four saturation irradiations were performed at reactor powers of 100 and 200 kW for 300 seconds and one burst irradiation was performed using a $1.61 pulse producing 19.11 M
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PADILHA, MEIRE de C. "Deteccao de neutrons utilizando CR-39." reponame:Repositório Institucional do IPEN, 1992. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10298.

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Schoen, Keary. "Neutron interferometry experiments at NIST : a study of few body forces /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3137746.

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LIMA, RUY B. de. "Avaliacao experimental do fluxo de neutrons de um irradiador com fontes de AmBe e sua possibilidade de uso em analise de materiais." reponame:Repositório Institucional do IPEN, 2003. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11127.

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Criswell, Leah. "Neutron diffraction and quasielastic neutron scattering studies of films of N-alkanes and a branched alkane absorbed on graphite." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/6010.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 11, 2008) Includes bibliographical references.
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ANGIOLETTO, ELCIO. "Medidas e calculos de espectro de neutrons emergentes de dutos em blindagens." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10794.

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Han, Sang-Wook. "Spin-polarized neutron reflectivity and x-ray scattering studies on thin film superconductors /." free to MU campus, to others for purchase, 1999. http://wwwlib.umi.com/cr/mo/fullcit?p9962527.

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McNamara, Steven. "Fusion for neutrons." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/44108.

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This thesis addresses the application of fusion as a powerful source of energetic neutrons. The conditions for maximising fusion power density, Pf, in a neutral beam fuelled plasma are determined and used to inform a high Pf device optimisation procedure. Restrictions on the externally applied power, not previously considered, are shown to be a crucial factor in determining the optimum plasma and reactor conditions. Two distinct regimes of operation exist, separated by a discontinuity in the optimum conditions. In one regime, beam-on-target reactions dominate and Pf is maximised when operating
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Conti, V. "Neutrons for medicine." Doctoral thesis, Università degli Studi di Milano, 2011. http://hdl.handle.net/2434/172333.

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There are a lot of definitions of cancer: in a few words one could say that it represents a group of diseases characterized by the growth and uncontrolled diffusion of abnormal cells. Considering the number of deaths at the world level in 2005 (50 millions), cancer is responsible of 7.6 millions (that is 13%) with an expected increase to 11.4 millions in 2030. The innovations in the field of radiotherapy, chemotherapy, surgery and their combined applications have allowed to maintain these numbers under control. Radiation therapy has been used for the treatment of cancer and other diseas
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Libri sul tema "Neutrons"

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Sevastʹi︠a︡nov, V. D. Kharakteristiki poleĭ neĭtronov: Istochniki mgnovennykh neĭtronov delenii︠a︡, generatory 14 MėV neĭtronov, issledovatelʹskie i ėnergeticheskie reaktory, ustroĭstva, konvertirui︠u︡shchie neĭtronnoe izluchenie : spravochnik. VNIIFTRI, 2007.

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B, Pal P., ed. Massive neutrinos in physics and astrophysics. World Scientific, 1991.

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B, Pal P., ed. Massive neutrinos in physics and astrophysics. 3rd ed. World Scientific, 2004.

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Williams, W. Gavin. Polarized neutrons. Clarendon Press, 1988.

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International Collaboration on Advanced Neutron Sources. Meeting. Advanced neutron sources, 1988: Proceedings of the 10th Meeting of the International Collaboration on Advanced Neutron Sources (ICANS X) held at Los Alamos, 3-7 October 1988. Institute of Physics, 1989.

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F, Mezei, Pappas C. 1955-, and Gutberlet T. 1958-, eds. Neutron spin echo spectroscopy: Basics, trends, and applications. Springer, 2003.

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7

Csikai, Julius. A gyors-neutron-adatok és a fúziós reaktorok: Akadémiai székfoglaló, 1986. január 29. Akadémiai Kiadó, 1987.

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Kirʹi͡anov, G. I. Generatory bystrykh neĭtronov. Ėnergoatomizdat, 1990.

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Sears, Varley F. Neutron optics: An introduction to the theory of neutron optical phenomena and theit applications. Oxford University Press, 1989.

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M, Raby T., NIST Center for Neutron Research, and Materials Science and Engineering Laboratory (U.S.), eds. NIST Center for Neutron Research: Technical activities 1997. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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Capitoli di libri sul tema "Neutrons"

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Pyeon, Cheol Ho. "Introduction." In Accelerator-Driven System at Kyoto University Critical Assembly. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0344-0_1.

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AbstractAt the Kyoto University Critical Assembly (KUCA), the accelerator-driven system (ADS) is composed of a solid-moderated and solid-reflected core (A-core) and a pulsed-neutron generator (14 MeV neutrons) or the fixed-filed alternating gradient (FFAG) accelerator (100 MeV protons). At KUCA, two external neutron sources, including 14 MeV neutrons and 100 MeV protons, are separately injected into the A-core, and employed for carrying out the ADS experiments. With the combined use of the A-core and two external neutron sources, basic and feasibility studies of ADS have been engaged in the ex
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Swinhoe, M. T., and N. Ensslin. "The Origin of Neutron Radiation." In Nondestructive Assay of Nuclear Materials for Safeguards and Security. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-58277-6_13.

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AbstractThis chapter presents the various sources of neutrons that are important in nondestructive measurements. These sources include the key mechanisms of spontaneous fission, neutrons from alpha particle reactions on light elements, and induced fission. The characteristics of neutrons resulting from typical sources are presented. A brief discussion of other neutrons sources, such as those from less common nuclear reactions, cosmic rays, and neutron generators, is included.
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Pyeon, Cheol Ho. "Neutron Spectrum." In Accelerator-Driven System at Kyoto University Critical Assembly. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0344-0_5.

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AbstractThe subcritical multiplication factor is considered an important index for recognizing, in the core, the number of fission neutrons induced by an external neutron source. In this study, the influences of different external neutron sources on core characteristics are carefully monitored. Here, the high-energy neutrons generated by the neutron yield at the location of the target are attained by the injection of 100 MeV protons onto these targets. In actual ADS cores, liquid Pb–Bi has been selected as a material for the target that generates spallation neutrons and for the coolant in fast
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Swinhoe, M. T., J. D. Hutchinson, and P. M. Rinard. "Neutron Interactions with Matter." In Nondestructive Assay of Nuclear Materials for Safeguards and Security. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-58277-6_14.

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AbstractThis chapter describes the interactions that neutrons have with matter. There is a description of microscopic interactions, such as fission, scattering and absorption, using the concept of cross-section. The idea of individual neutron interactions is extended to the macroscopic behavior of neutrons, giving rise to the calculation of reaction rates and mean free paths. The important quantities of moderation and neutron multiplication are introduced. There is a brief discussion of neutron shielding and transport calculational techniques.
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Ramirez-Cuesta, A. J., and Philip C. H. Mitchell. "Neutrons and Neutron Spectroscopy." In Local Structural Characterisation. John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118681909.ch3.

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Raven, Will. "Isotope Shifts, Radioactive Decay, and the Nuclear Forces." In Atomic Physics for Everyone. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-69507-0_10.

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AbstractIn this chapter, we explore the nucleus, focusing on how the number of neutrons in a nucleus influences transition frequencies and the stability of atoms. We begin by examining the effect of neutrons on transition frequencies, then shift into detailed discussions of the nuclear forces and principles governing atomic stability and radioactive decay. Various modes of radioactive decay, including neutron and proton emission, $$\alpha $$ α decay, spontaneous fission, $$\beta ^-$$ β − decay, $$\beta ^+$$ β + decay, and electron capture, are investigated, with an emphasis on the conditions u
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Pyeon, Cheol Ho. "Reactor Kinetics." In Accelerator-Driven System at Kyoto University Critical Assembly. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0344-0_3.

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AbstractIn static and kinetic experimental analyses, the reactivity effect of introducing a neutron guide has been examined with various materials and adjustments of the beam window. With the objective of improving the KUCA core characteristics, the implementation of the neutron guide is predicted to increase the fast neutrons in directing the fuel region. With regard to the kinetic characteristics, the subcriticality and the prompt neutron decay constant are monitored for several core configurations and detector positions. The KUCA core is equipped to make locally a hard spectrum core region
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Ignatovich, V. K. "Enigmatic Neutrons." In The Present Status of the Quantum Theory of Light. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5682-0_29.

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Gooch, Jan W. "Thermal Neutrons." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_11758.

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Kornilov, Nikolay. "Introduction." In Fission Neutrons. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07133-6_1.

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Atti di convegni sul tema "Neutrons"

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Yogo, Akifumi. "Advances of Laser-driven Neutron Source and its applications at Osaka University." In Laser Applications Conference. Optica Publishing Group, 2024. https://doi.org/10.1364/lac.2024.lw4b.2.

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Laser-driven neutron source (LDNS) is attracting interest for several reasons including (i) compactness of the source, (ii) neutron pulse shortness and (iii) transportability of laser beam. Through reviewing recent activities, we discuss the potential and limit of LDNS by showing that neutrons ranging from meV to MeV in energy were generated by LDNS and applied to neutron analysis and fundamental science.
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Khan, Nafisah, Rachid Machrafi, and Vitali Kovaltchouk. "Response Functions of a Cs2LiYCl6 Scintillator to Neutron and Gamma Radiation." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-15249.

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A new scintillator, CLYC, has been investigated for possible use in neutron spectrometry. This sensor provides neutron detection for both thermal and fast neutrons from the reactions 6Li(n,α) and 35Cl(n,p), respectively. This work primarily focuses on the detection of fast neutrons since there is currently no sensor that can accurately and efficiently provide information about their incident neutron energy. Conventional methods of fast neutron detection have been based on utilizing materials that use the elastic scattering process of neutrons on 1H to create recoil protons or by thermalizing a
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Wang, Dong, Bin He, and Quanhu Zhang. "Neutron-Gamma Discrimination Using Zero-Crossing Method for BC454 Boron Loaded Plastic Scintillator." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29223.

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Boron loaded plastic scintillator could detect both fast neutrons (thanks to hydrogen) and slow neutrons (thanks to 10B). The large cross sections of both reactions lead to high detection efficiency of incident neutrons. However, gamma rays must be rejected first as the scintillator is also sensitive to them. In the present research zero crossing method was used to test neutron-gamma discrimination performance of BC454 boron loaded plastic scintillator. Three contrast experiments were carried out and different thermalization degrees lead to different time spectra in the MCA. Further analysis p
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VANHOEFER, Laura. "Neutron Shielding Simulations and Muon-induced Neutrons." In XVI International Workshop on Neutrino Telescopes. Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.244.0085.

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Baleanu, Dumitru, and Abdelouahab Kadem. "About the FN Approximation to Fractional Neutron Transport Equation in Slab Geometry." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47731.

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The neutron transport denotes the study of the motions and interactions of neutrons with materials. In given applications we need to know where neutrons are in an apparatus, what direction they are moving, and how fast they are going. In this manuscript the Legendre polynomial approximation method FN was applied to the one dimensional slab geometry neutron transport equation.
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Wang, Peng, and Suizheng Qiu. "Study on the Coupled Neutronic and Thermal-Hydraulic Characteristics of the New Concept Molten Salt Reactor." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75868.

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The new concept Molten Salt Reactor is the only liquid-fuel reactor of the six Generation IV advanced nuclear energy systems. The liquid molten salt serves as the fuel and coolant simultaneously and causes one important feature: the delayed neutrons precursors are drifted by the fuel flow, which leads the spread of delayed neutrons distribution to non-core parts of the primary circuit, and it also can result in a reactivity variation depending on the flow condition of the fuel salt. Therefore, the neutronic and thermal-hydraulic characteristics of the Molten Salt Reactor is quite different fro
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7

Hillebrandt, Wolfgang. "Neutrons, neutrinos, and the physics of supernovas." In 4th International Conference on Applications of Nuclear Techniques: Neutrons and their Applications, edited by George Vourvopoulos and Themis Paradellis. SPIE, 1995. http://dx.doi.org/10.1117/12.204141.

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8

Young, Christian, Michael Liesenfelt, Chloe Browning, Ryan Thurber, Jason Hayward, and Jeff Preston. "Proton Recoil Event Localization for Fast Neutron Radiography." In ASNT Research Symposium 2023. The American Society for Nondestructive Testing Inc., 2023. http://dx.doi.org/10.32548/rs.2023.077.

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Neutron radiography is an important tool for the imaging of dense, metallic objects for a wide range of applications. Many systems currently in operation either require large-scale user facilities to produce neutrons [1, 2] or low-efficiency thin-film converters to detect neutrons [3]. These drawbacks lead to neutron radiography seeing limited use in the field. To compensate for these drawbacks, a system has been developed using a scatter-based plastic scintillator, a scalable readout module, and a D-T neutron generator. This system has been developed for use as a field-deployable neutron radi
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9

Sykes, A., M. P. Gryaznevich, G. Voss, D. Kingham, and B. Kuteev. "Fusion for neutrons: A realisable fusion neutron source." In 2011 IEEE 24th Symposium on Fusion Engineering (SOFE). IEEE, 2011. http://dx.doi.org/10.1109/sofe.2011.6052205.

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10

Finlay, Roger W. "Neutron scattering above 25 MeV with monoenergetic neutrons." In AIP Conference Proceedings Volume 124. AIP, 1985. http://dx.doi.org/10.1063/1.34996.

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Rapporti di organizzazioni sul tema "Neutrons"

1

Haight, Robert C. Scission Neutrons in Spontaneous and Neutron-Induced Fission: Effect on Prompt Fission Neutron Spectra. IAEA Nuclear Data Section, 2020. http://dx.doi.org/10.61092/iaea.6fxg-n58v.

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This consultant was asked to look into the possibility of so-called “scission neutrons”, that is neutrons emitted in the fission process before full acceleration of the two large fragments. Results of new measurements that measure neutron emission relative to the direction of the fragments are available, and the quantification of scission neutron has been derived from these data. More detailed models of the fission process are also new. It is however the conclusion of this consultant that the existence of scission neutrons has not been proven from experimental data. Further, the possibility of
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2

Vorobyev, A. S., and O. A. Shcherbakov. Scission Neutrons from Thermal Neutron induced Fission of 239-Pu and Spontaneous Fission of 252-Cf. IAEA Nuclear Data Section, 2020. http://dx.doi.org/10.61092/iaea.8t4w-essq.

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The properties of “scission” neutrons from thermal-neutron induced fission of 239Pu(nth,f) and spontaneous fission of 252Cf(sf) were obtained by comparing experimental angular and energy distributions of the prompt fission neutrons measured recently at PNPI with model distributions calculated under the assumption that all prompt fission neutrons are emitted from fully accelerated fragments.
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3

Egorov, A. S., V. M. Piksaikin, D. E. Gremyachkin, K. V. Mitrofanov, and V. F. Mitrofanov. 8-Group Model Energy Spectra of Delayed Neutrons from Thermal Fission of 235U. IAEA Nuclear Data Section, 2022. http://dx.doi.org/10.61092/iaea.h7h2-d6g0.

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The energy spectra of delayed neutrons from neutron-induced fission of 235U are estimated in the 8-group model using the Kalman filtering method. The spectra are available for viewing and downloading on the IAEA Reference database for beta-delayed neutrons.
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4

Vorobyev, A. S., and O. A. Shcherbakov. Experimental Investigation of the Properties of Scission Neutrons In Thermal-Neutron Induced Fission of 233U and 235U. IAEA Nuclear Data Section, 2020. http://dx.doi.org/10.61092/iaea.7zgq-zwwx.

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Abstract (sommario):
The properties of “scission” neutrons from thermal neutron induced fission of 233U and 235U were obtained by comparing experimental angular and energy distributions of the prompt fission neutrons measured recently at PNPI with model distributions calculated under the assumption that all prompt fission neutrons are emitted from fully accelerated fragments. To obtain model distributions, it is assumed to use the spectra of prompt fission neutrons measured at small angles relative to the preferential direction of movement of light and heavy fragments because it is expected that just for these ang
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5

Smith, A. B., and A. Fessler. Neutrons and antimony neutronic evaluations. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/761284.

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6

Goeler, S. von, A. L. Roquemore, L. C. Johnson, et al. Fast detection of 14 MeV neutrons on the TFTR neutron collimator. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/206578.

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7

Courant, Ernest D. Polarized Neutrons in RHIC. Office of Scientific and Technical Information (OSTI), 1998. http://dx.doi.org/10.2172/1119396.

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8

Broussard, Leah J. Ultracold Neutrons at LANSCE. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1130510.

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9

Plaster, Bradley. Neutrons and Fundamental Symmetries. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1235013.

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10

Srdoc, D., and S. A. Marino. Microdosimetry of monoenergetic neutrons. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10129437.

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