Temperature Dependence of Thermal Neutrons from the Moon.

Little, R. C. ; Feldman, W. C.

Technical Information Center Oak Ridge Tennessee

关键词: Moon;    Temperature dependence;    Thermal neutrons;   

RP-ID  :  DE2001764012

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Planetary thermal neutron fluxes provide a sensitive proxy for rnafic and feldspathic terranes, and are also necessary for translating measured gamma-ray line strengths to elemental abundances. Both functions require a model for near surface temperatures and a knowledge of the dependence of thermal neutron flux on temperature. We have explored this dependence for a representative sample of lunar soil compositions and surface temperatures using MCNP. For all soil samples, the neutron density is found to be independent of temperature, in accord with neutron moderation theory.