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

ReactionH3(d,n)He4as a Calibrated Polarized Neutron Source and the Analyzing Power ofHe4(n,n)He4from 20 to 30 MeV

1976 ◽  
Vol 37 (13) ◽  
pp. 809-812 ◽  
Author(s):  
P. W. Lisowski ◽  
R. L. Walter ◽  
G. G. Ohlsen ◽  
R. A. Hardekopf
Keyword(s):  
Neutron Source ◽  
Polarized Neutron ◽  
Analyzing Power

S-Wave Detector of Deuteron Polarization and 14-Mev Polarized-Neutron Source

1959 ◽  
Vol 2 (8) ◽  
pp. 349-351 ◽  
Author(s):  
A. Galonsky ◽  
H. B. Willard ◽  
T. A. Welton
Keyword(s):  
Neutron Source ◽  
S Wave ◽  
Wave Detector ◽  
Polarized Neutron

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 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

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.

scholarly journals Nuclear Physics: The Ultracold Neutron Source

2014 ◽  
Author(s):  
Karen E. Kippen ◽  
Steven Clayton
Keyword(s):  
Neutron Source ◽  
Nuclear Physics ◽  
Ultracold Neutron

scholarly journals The Measurement of the Neutron Yield of the 7Li(p,n)7Be Reaction in Lithium Targets

Biology ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 824
Author(s):  
Marina Bikchurina ◽  
Timofey Bykov ◽  
Dmitrii Kasatov ◽  
Iaroslav Kolesnikov ◽  
Aleksandr Makarov ◽  
...  
Keyword(s):  
Neutron Source ◽  
Neutron Yield ◽  
Nuclear Physics ◽  
In Vivo Studies ◽  
Budker Institute ◽  
Original Design ◽  
Tandem Accelerator ◽  
National Medical

A compact accelerator-based neutron source has been proposed and created at the Budker Institute of Nuclear Physics in Novosibirsk, Russia. An original design tandem accelerator is used to provide a proton beam. The neutron flux is generated as a result of the 7Li(p,n)7Be threshold reaction using the solid lithium target. A beam shaping assembly is applied to convert this flux into a beam of epithermal neutrons with characteristics suitable for BNCT. The BNCT technique is being tested in in vitro and in vivo studies, and dosimetry methods are being developed. Currently, the BNCT technique has entered into clinical practice in the world: after successful clinical trials, two clinics in Japan began treating patients, and four more BNCT clinics are ready to start operating. The neutron source proposed at the Budker Institute of Nuclear Physics served as a prototype for a facility created for a clinic in Xiamen (China). It is planned to equip the National Medical Research Center of Oncology (Moscow, Russia) and National Oncological Hadron Therapy Center (Pavia, Italy) with the same neutron sources. Due to the impending use of an accelerator neutron source for treating patients, the validation of the neutron yield of the 7Li(p,n)7Be reaction in lithium metal targets is required. The theoretical neutron yield has not been evaluated experimentally so far.

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