近地轨道上HZE辐射成分的LET分布和剂量。

LET-distributions and doses of HZE radiation components at near-Earth orbits.

作者信息

Silberberg R, Tsao C H, Adams J H, Letaw J R

机构信息

Naval Research Laboratory, E.O. Hulburt Center for Space Research, Washington, DC 20375, USA.

出版信息

Adv Space Res. 1984;4(10):143-51. doi: 10.1016/0273-1177(84)90236-9.

DOI:10.1016/0273-1177(84)90236-9

PMID:11539620

Abstract

Among cosmic rays, the heavy nuclei ranging from carbon to iron provide the principal contribution to the dose equivalent. The LET-distributions and absorbed dose aid dose equivalent have been calculated and are presented as a function of shielding and tissue self-shielding. At solar minimum, outside the magnetosphere, the unshielded dose equivalent of nuclei with atomic number Z > or = 6 is about 47 rem/year. The contribution of the target nuclei adds 7 rem/year. With 4 g/cm2 aluminum shielding, and at a depth of 5 cm in a biological phantom of 30 cm diameter, the respective values are 11 and 10 rem/year. Corresponding dose rates for orbits with various inclinations are presented, as well as the LET distributions of various components of cosmic rays.

摘要

在宇宙射线中，从碳到铁的重核是剂量当量的主要贡献源。已经计算了传能线密度（LET）分布、吸收剂量和剂量当量，并将其表示为屏蔽和组织自身屏蔽的函数。在太阳活动极小期，在磁层之外，原子序数Z≥6的原子核的未屏蔽剂量当量约为47雷姆/年。靶核的贡献增加7雷姆/年。使用4克/平方厘米的铝屏蔽，在直径为30厘米的生物模型中5厘米深处，相应的值分别为11雷姆/年和10雷姆/年。给出了不同倾角轨道的相应剂量率，以及宇宙射线各组分的LET分布。