近地空间中能量从热中子到几兆电子伏特的中子通量测量：苏联核物理研究所的结果。

Measurements of neutron fluxes with energies from thermal to several MeV in near-Earth space: SINP results.

作者信息

Shavrin P I, Kuzhevskij B M, Kuznetsov S N, Nechaev O Yu, Panasyuk M I, Ryumin S P, Yushkov B Yu, Bratolyubova-Tsulukidze L S, Lyagushin V I, Germantsev Yu L

机构信息

Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.

出版信息

Radiat Meas. 2002 Oct;35(5):531-8. doi: 10.1016/s1350-4487(02)00086-0.

DOI:10.1016/s1350-4487(02)00086-0

PMID:12442751

Abstract

Neutron measurement results obtained at SINP MSU since 1970 are presented. These measurements were made using techniques based on neutron moderation and subsequent detection in a Li6I(Eu) crystal or a He3 coronal counter. The measurements were mainly carried out in orbits with inclination of 52 degrees and altitudes of 200-450 km. The spatial and angular distributions of the measured neutron fluxes were studied. The albedo neutron flux was estimated according to the count rate difference for opposite detector orientations towards Earth and away from it. This flux is comparable to the local neutron flux outside the Brazil anomaly region, where local neutrons dominate. Neutron fluxes, generated by solar protons, were detected during a solar flare on June 6, 1991 for the first time. Their spectrum was estimated as a power law with alpha>2.

摘要

介绍了自1970年以来在莫斯科国立大学核物理研究所获得的中子测量结果。这些测量采用了基于中子慢化以及随后在Li6I（Eu）晶体或He3日冕计数器中进行探测的技术。测量主要在倾角为52度、高度为200 - 450公里的轨道上进行。研究了测量到的中子通量的空间和角分布。根据探测器朝向地球和远离地球的相反方向的计数率差异估算了反照率中子通量。该通量与巴西异常区域之外当地中子占主导的局部中子通量相当。1991年6月6日太阳耀斑期间首次探测到由太阳质子产生的中子通量。其能谱估计为幂律，α>2。