scholarly journals Nuclear physics in the 10–300 MeV energy range using a pulsed white neutron source

1985 ◽  
Author(s):  
C. D. Bowman ◽  
S. A. Wender ◽  
G. F. Auchampaugh
Keyword(s):  
Energy Range ◽  
Neutron Source ◽  
Nuclear Physics

Optimization of a Multiline Neutron Source Based on a 232Th Filter

2017 ◽  
Vol 3 (3) ◽  
Author(s):  
Y. Ben-Galim ◽  
R. Moreh ◽  
I. Orion
Keyword(s):  
Energy Range ◽  
Cross Section ◽  
Neutron Source ◽  
Absorber Thickness ◽  
Optimum Thickness ◽  
Strong Intensity

A multiline neutron source can be produced by using a metallic 232Th filter in conjunction with a white neutron source. The multiline spectrum consists of ∼20 relatively strong intensity lines ranging from 10 to 4000 eV. It is shown that the width of each neutron line of the spectrum is strongly dependent on the absorber thickness. This neutron source is useful for accurate cross section measurements with precise neutron energies. The optimum thickness of the 232Th absorber, which was found to yield a sharp multiline spectrum throughout the above energy range, was found to be ∼14 cm.

The energy release and temperature field in the ultracold neutron source of the WWR-M reactor at the Petersburg Nuclear Physics Institute

2016 ◽  
Vol 79 (9-10) ◽  
pp. 1391-1396
Author(s):  
A. P. Serebrov ◽  
B. V. Kislitsin ◽  
M. S. Onegin ◽  
V. A. Lyamkin ◽  
D. V. Prudnikov ◽  
...  
Keyword(s):  
Temperature Field ◽  
Energy Release ◽  
Neutron Source ◽  
Nuclear Physics ◽  
Ultracold Neutron ◽  
Physics Institute ◽  
Nuclear Physics Institute

scholarly journals Nuclear Physics: Polarized Neutron Source

Nature ◽  
1971 ◽  
Vol 231 (5299) ◽  
pp. 148-148 ◽  
Author(s):  
Keyword(s):  
Neutron Source ◽  
Nuclear Physics ◽  
Polarized Neutron

Nuclear astrophysics: nucleosynthesis in the Universe

2012 ◽  
Vol 11 (4) ◽  
pp. 243-250 ◽  
Author(s):  
Alinka Lépine-Szily ◽  
Pierre Descouvemont
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Nuclear Physics ◽  
Nuclear Astrophysics ◽  
Reaction Rates ◽  
Reaction Cross ◽  
Point Of View ◽  
Definition Of ◽  
The Universe ◽  
Reaction Cross Sections

AbstractNuclear astrophysics is a relatively young science; it is about half a century old. It is a multidisciplinary subject, since it combines nuclear physics with astrophysics and observations in astronomy. It also addresses fundamental issues in astrobiology through the formation of elements, in particular those required for a carbon-based life. In this paper, a rapid overview of nucleosynthesis is given, mainly from the point of view of nuclear physics. A short historical introduction is followed by the definition of the relevant nuclear parameters, such as nuclear reaction cross sections, astrophysical S-factors, the energy range defined by the Gamow peak and reaction rates. The different astrophysical scenarios that are the sites of nucleosynthesis, and different processes, cycles and chains that are responsible for the building of complex nuclei from the elementary hydrogen nuclei are then briefly described.

OVERVIEW PROSPECTS AT BINP

2014 ◽  
Vol 35 ◽  
pp. 1460448
Author(s):  
I. A. KOOP ◽  
Keyword(s):  
Energy Range ◽  
Nuclear Physics ◽  
Collision Energy ◽  
High Energy ◽  
Budker Institute ◽  
Science Project ◽  
Electron Positron ◽  
Two Machines

In this report the overview of activity at existing and future electron-positron high energy colliders at BINP is presented. VEPP-2000 and VEPP-4M electron-positron colliders are currently being in operation at the Budker Institute of Nuclear Physics in Novosibirsk. These two machines cover a wide collision energy range: from 0.32 GeV to 2 GeV (VEPP-2000) and from 1.8 GeV to 11 GeV (VEPP-4M). Both complexes will be upgraded after successful start of operation in 2013 of the new electron-positron injector complex VEPP-5, which should supply both facilities by much more intense beams. Super-tau-charm factory waits for the final government's approval being considered as one of 6 mega-science project in Russia.

scholarly journals Light yield of cold undoped CsI crystal down to 13 keV and the application of such crystals in neutrino detection

2020 ◽  
Vol 80 (12) ◽  
Author(s):  
Keyu Ding ◽  
Dmitry Chernyak ◽  
Jing Liu
Keyword(s):  
Energy Range ◽  
Neutron Source ◽  
National Laboratory ◽  
Light Yield ◽  
Radioactive Source ◽  
Experimental Result ◽  
Spallation Neutron Source ◽  
Oak Ridge ◽  
Neutrino Detection ◽  
Electron Equivalent

AbstractThe light yield of an undoped CsI crystal at about 77 Kelvin was measured to be $$33.5 \, \pm \, 0.7$$ 33.5 ± 0.7  photo-electrons (PE) per keV electron-equivalent (keVee) in the energy range of [13, 60] keVee using X and $$\gamma $$ γ -rays from an $$^{241}$$ 241 Am radioactive source. Based on this experimental result, the performance of 10 kg cryogenic inorganic scintillating crystals coupled to SiPM arrays to probe non-standard neutrino interactions through the detection of coherent elastic neutrino-nucleus scatterings at the spallation neutron source, Oak Ridge National Laboratory, was examined in detail.

scholarly journals GEANT4 Modeling Of Energy Spectrum Of Fast Neutrons Source For The Development Of Research Technique Of Heavy Scintillators

2019 ◽  
Keyword(s):  
Energy Spectrum ◽  
Neutron Source ◽  
Nuclear Physics ◽  
Interaction Model ◽  
Initial Energy ◽  
Low Energy ◽  
Energy Spectra ◽  
Fast Neutrons ◽  
Physical Experiments ◽  
The Monte Carlo Method

The proposed work demonstrates the results of creating and investigating the mathematical model of the source of fast neutrons. Computer modeling of the energy spectrum of fast neutrons was carried out for 239PuBe neutron source. The model of the source of fast neutrons has been developed. Neutrons in this model have an energy spectrum from 100 keV to 11 MeV with 100 keV step. Simulation is performed by the Monte-Carlo method. The model carrier is a computer program developed in the C++ programming language in the Linux operating system environment, using the Geant4 toolkit. All necessary classes describing low-energy models were used for the simulation of the passage of neutrons through materials of detectors. Those take into account the elastic scattering, inelastic scattering, radiative capture and fission. We consider these processes because models of processes implemented in our software will be also used for other problems of neutrons transport, for example, for passing neutrons through various substances, and for conducting virtual laboratory works. The PhysicsList class of our program contains classes G4NeutronHPElastic, G4NeutronHPElasticData, G4NeutronHPInelastic, G4NeutronHPInelasticData, G4NeutronHPCapture, G4NeutronHPCaptureData, etc. based on the NeutronHP model for neutron interactions at low energy, as well as the neutron data library G4NDL4.5. Diagrams containing energy spectra of a source of fast neutrons modeled in two ways are presented in the paper. The analysis of the obtained energy spectra is carried out. Virtual nuclear physics experiments are carried out with the aim of testing the elaborated neutron-matter interaction model. The processes occurring in scintillator substances during the passage of fast neutrons through them, have been studied. 109 neutrons were used as primary particles emitted isotropically, and we used our simulation results of 239PuBe neutron source to describe the initial energy spectrum. The created model of 239PuBe neutron source can be used for the investigation of scintillation detectors Bi4Ge3O12, CdWO4, Gd2SiO5 and others, as well as studying their characteristics. Processes in heavy oxide scintillators substance during the registration of fast neutrons can be studied using the developed model. It is shown that for registration of the flow of neutrons from 239PuBe neutron source, using Bi4Ge3O12 or CdWO4 scintillators is more preferable. Results of the virtual nuclear physical experiments satisfy the published experimental data.

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