Geant4 simulation of multi-sphere spectrometer response function and the detection of 241Am–Be neutron spectrum
| Autor: | Zejie Yin, Jing Cao, Chun-Yu Jiang, Xiao-Fei Jiang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Nuclear and High Energy Physics Spectrometer 010308 nuclear & particles physics Scattering Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory Analytical chemistry Proportional counter 01 natural sciences Neutron temperature 030218 nuclear medicine & medical imaging Computational physics 03 medical and health sciences 0302 clinical medicine Nuclear Energy and Engineering 0103 physical sciences Neutron source Neutron detection Neutron SPHERES Nuclear Experiment |
| Zdroj: | Nuclear Science and Techniques. 28 |
| ISSN: | 2210-3147 1001-8042 |
| DOI: | 10.1007/s41365-017-0328-2 |
| Popis: | This paper is aimed at detecting the neutron spectrum of 241Am–Be, a widely used neutron source, with the SP9 3He proportional counter, which is a multi-sphere spectrometer system of eight thermal neutron detectors embedded in eight polyethylene (PE) spheres of varying diameters. The transport processes of a neutron in the multi-sphere spectrometer are simulated using the Geant4 code. Two sets of response functions of the PE spheres are obtained for calculating the 241Am–Be neutron spectrum. Response Function 1 utilizes the thermal neutron scattering model G4NeutronHPThermalScattering for neutron energies of ≤ 4 eV, and Response Function 2 has no thermal treatment. Neutron spectra of an 241Am–Be neutron source are measured and compared to those calculated by using the response functions. The results show that response function with thermal treatment is more accurate and closer to the real spectrum. |
| Databáze: | OpenAIRE |
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