GEANT4 simulations of the neutron beam characteristics for 9Be/7Li targets bombarded by the low energy protons

被引：7

作者：

Lu, Yu ^{[1
,2
]}

Xu, Zhao ^{[1
]}

Zhang, Lianxin ^{[1
,2
]}

Wang, Zibang ^{[1
,2
]}

Li, Taosheng ^{[1
]}

Khan, Muhammad Salman ^{[1
]}

机构：

[1] Chinese Acad Sci, HFIPS, Inst Nucl Energy Safety Technol, Key Lab Neutron & Radiat Safety, Hefei 230031, Anhui, Peoples R China

[2] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2021年 / 506卷

基金：

国家重点研发计划;

关键词：

GEANT4; Physics list; Neutron yield; Be-9(pxn); Li-7(pxn); NUCLEAR-DATA; YIELDS;

D O I：

10.1016/j.nimb.2021.09.005

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Be-9(p,xn) and Li-7(p,xn) are two reactions for the accelerator-based compact neutron source at low energy protons conditions, especially for BNCT facilities and it is necessary to simulate the beam characteristics accurately. The different reference physics lists recommended by GEANT4 have been used to calculate the neutron beam characteristics for the Be-9 and Li-7 targets bombarded by proton beams of 5 similar to 10 MeV and the accuracy of GEANT4 simulations has been discussed. By comparing with the reference data such as experimental data, MCNP6 simulations and numerical calculations, the results calculated by QGSP_BIC_AllHP show good agreement with a relative error of less than 10%. The neutron yields level out and have a tendency to move forward, when the thickness is greater than the range of protons in targets. However, the neutron yields are significantly underestimated by other physics lists except for QGSP_BIC_AllHP. In addition, two fitted curve equations are acquired to quickly estimate the neutron yield for Be-9 and Li-7 targets below 20 MeV. Therefore, due to the limitation of the particle type and energy range in this study, GEANT4 with QGSP_BIC_AllHP is recommended to calculate hadronic interactions of protons with matter below 20 MeV.

引用

页码：8 / 14

页数：7

共 46 条

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