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1.新疆大学物理科学与技术学院 乌鲁木齐 830046
2.中国科学院新疆理化技术研究所 乌鲁木齐 830011
3.新疆电子信息材料与器件重点实验室 乌鲁木齐 830011
[ "荀明珠,男,1990年出生,2012年毕业于西南科技大学,现为硕士研究生,核技术及应用专业", "XUN Mingzhu, male, born in 1990, graduated from Southwest University of Science and Technology in 2012, master student, major in nuclear technology and application" ]
何承发,E-mail:hecf@ms.xjb.ac.cn HE Chengfa,E-mail:hecf@ms.xjb.ac.cn
收稿日期:2016-02-20,
修回日期:2016-04-05,
纸质出版日期:2016-06-10
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荀明珠, 何承发, 陆妩, 等. 高能56Fe离子入射屏蔽材料的次级粒子模拟分析[J]. 核技术, 2016,39(6):060201
Mingzhu XUN, Chengfa HE, Wu LU, et al. Secondary particle simulation analysis of high-energy 56Fe ion inject various shielding material[J]. Nuclear techniques, 2016, 39(6): 060201
荀明珠, 何承发, 陆妩, 等. 高能56Fe离子入射屏蔽材料的次级粒子模拟分析[J]. 核技术, 2016,39(6):060201 DOI: 10.11889/j.0253-3219.2016.hjs.39.060201.
Mingzhu XUN, Chengfa HE, Wu LU, et al. Secondary particle simulation analysis of high-energy 56Fe ion inject various shielding material[J]. Nuclear techniques, 2016, 39(6): 060201 DOI: 10.11889/j.0253-3219.2016.hjs.39.060201.
空间辐射环境下的高能重离子入射屏蔽材料会产生大量次级粒子
为研究屏蔽材料产生的次级粒子对太空舱内辐射环境的影响
本文使用基于蒙特卡罗方法的Geant4软件模拟空间高能
56
Fe离子入射铝、碳、聚乙烯、水4种屏蔽材料
分析透射屏蔽体的初级粒子及由屏蔽材料产生的次级电子、次级中子、次级质子和次级γ的能谱以及水吸收体中的能量沉积和深度剂量分布。分析产生的次级重粒子类型和能量
比较4种屏蔽材料对高能Fe离子的屏蔽性能。结果表明
聚乙烯材料对高能重离子的屏蔽性能最好
但同时产生的次级重粒子的能量最大
约为铝材料产生次级重粒子能量的4倍。屏蔽体产生所有次级粒子中
次级质子和原子序数为22-26的次级重粒子贡献最大。
Background
2
The heavy ion in the galaxy cosmos rays with extremely high energy can be fatal to the astronaut and electronic device in the spacecraft.
Purpose
2
This study aims to analyze the secondary particles produced by high energy heavy ion inject shielding materials of spacecraft.
Methods
2
Based on the Monte-Carlo method simulation software Geant4
1-V
&
#183;u
-156
Fe ion incident four kinds of shielding material aluminum
aluminum carbon
polyethylene and water with 1.35-g
&
#183;cm
-2
mass thickness have been studied. The energy deposition in the absorber and deep-dose distribution produced by the transmitted primary particles and secondary electrons
secondary neutrons
secondary protons and secondary gamma have been analyzed. All produced secondary heavy particles and energies from four kinds of shielding materials after injected high-energy 1-V
&
#183;u
-156
Fe ion have been investigated
and the shielding performance was analyzed and compared.
Results
2
Polyethylene material absorbs the most energy
thus preservebest shielding performance whilst majority of secondary particlesand energies are produced. The energy of secondary heavy ion is quadruple of that producedby aluminum material.
Conclusion
2
Amongall the secondary particles
secondary protons and secondary heavy ionswithatom number between 22 and 26 make the maximal contributions.
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