Monte Carlo simulation research on reference neutron radiation of <sup>241</sup>Am-Be radionuclide

Zhang Song; Wei Biao; Liu Yixin; Mao Benjiang; Qian Yikun; Huang Yuchen; Feng Peng

doi:10.11884/HPLPB202032.190478

Volume 32 Issue 5

Feb. 2020

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Yu Qing, Zhang Hui, Ma Danni. Numerical analysis of plasma and shock wave characteristics of the discharge in liquid[J]. High Power Laser and Particle Beams, 2021, 33: 075001. doi: 10.11884/HPLPB202133.200321

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Zhang Song, Wei Biao, Liu Yixin, et al. Monte Carlo simulation research on reference neutron radiation of ²⁴¹Am-Be radionuclide[J]. High Power Laser and Particle Beams, 2020, 32: 056001. doi: 10.11884/HPLPB202032.190478

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Monte Carlo simulation research on reference neutron radiation of ²⁴¹Am-Be radionuclide

doi: 10.11884/HPLPB202032.190478

Zhang Song^{1, 2
,},
Wei Biao¹,
Liu Yixin^{2, 3},
Mao Benjiang²,
Qian Yikun^{1, 2},
Huang Yuchen^{1, 2},
Feng Peng^{1
,
,}

1.
Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University, Chongqing 400044, China
2.
Institute of Nuclear Physics and Chemistry, CAEP, Mianyang 621900, China
3.
Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Received Date: 2019-12-22
Rev Recd Date: 2020-02-19
Publish Date: 2020-02-10

Abstract

Abstract

This paper presents the study on the ²⁴¹Am-Be radionuclide sources reference neutron radiation field metrology characteristics for calibrating area neutron dose monitoring instruments. The Monte Carlo method was used to simulate the neutron ambient dose equivalent rate, scattering neutron proportion and neutron energy spectrum distribution at different points of test in the air free-field reference neutron radiation (FRNR), the minimum size of standard reference neutron radiation (SRNR) specified in GB/T 14055 series standards and the actual reference neutron radiation (ARNR). The results show that air has little effect on the dose rate and energy spectrum distribution in FRNR, which is approximately an ideal reference neutron radiation; the minimum size SRNR shielded by polyethylene containing 5% boron can decrease thermal neutrons and reduce the proportion of scattered neutrons. The shadow-cone method is not suitable for the correction of scattered neutrons in small-sized reference neutron radiation; scattering neutrons in ARNR are fewer and have a lower proportion, and the proportion of scattered neutrons obtained by shadow-cone method is basically consistent with the theoretical values.
- reference neutron radiation,
- neutron ambient dose equivalent rate,
- neutron spectrum,
- scattered neutron,
- Monte Carlo

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References(21)

References

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