铁陨石与石质陨石辐射衰减特性的比较研究——以Mundrabilla和NWA 7629陨石为例

IF 1.2 Q3 MULTIDISCIPLINARY SCIENCES

Journal of Physical Science Pub Date : 2022-08-25 DOI:10.21315/aos2022.33.2.5

C. Eke

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引用次数: 0

摘要

本文的目的是比较和研究Mundrabilla和NWA 7629陨石在光子、快中子和带电粒子方面的辐射衰减特性。Mundrabilla的线性衰减系数高于NWA 7629。NWA 7629的半值层、十值层和平均自由径均大于Mundrabilla。Mundrabilla的有效原子序数、有效电子密度、等效原子序数和有效电导率在0.015 MeV - 15 MeV之间基本不变。Mundrabilla和NWA 7629的暴露累积因子和能量吸收累积因子在0.8 MeV时均最大。NWA 7629带电粒子的投影/连续减速近似(CSDA)范围高于Mundrabilla。Mundrabilla的快中子衰减优于NWA 7629。因此，Mundrabilla的光子、快中子和带电粒子衰减能力优于NWA 7629，这是由于其镍含量、密度和铁含量较高所致。

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A Comparative Study on the Radiation Attenuation Properties of Iron and Stony Meteorites: A Case of Mundrabilla and NWA 7629 Meteorites

The goal of this paper is to compare and investigate the radiation attenuation properties of Mundrabilla and NWA 7629 meteorites in terms of the photon, fast neutron and charged particles. The linear attenuation coefficients of Mundrabilla are higher than those of NWA 7629. The half value layers, tenth value layers and mean free paths of NWA 7629 are greater than those of Mundrabilla. The effective atomic number, effective electron density, equivalent atomic number and effective conductivity of the Mundrabilla are nearly constant between 0.015 MeV–15 MeV. Both the exposure build-up factors and energy absorption build-up factors are maximum at 0.8 MeV for Mundrabilla and NWA 7629. The projected/ continuous-slowing-down approximation (CSDA) ranges for charged particles for NWA 7629 are higher than those of Mundrabilla. The fast neutron attenuation of Mundrabilla is better than those of NWA 7629. Consequently, it can be concluded that photon, fast neutron and charged particles attenuation capability of Mundrabilla are better than NWA 7629 due to the nickel content, higher density and higher content of iron.

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来源期刊

Journal of Physical Science Physics and Astronomy-Physics and Astronomy (all)

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： The aim of the journal is to disseminate latest scientific ideas and findings in the field of physical sciences among scientists in Malaysia and international regions. This journal is devoted to the publication of articles dealing with research works in Chemistry, Physics and Engineering. Review articles will also be considered. Manuscripts must be of scientific value and will be submitted to independent referees for review. Contributions must be written in English and must not have been published elsewhere.