干旱区生态环境知识资源中心(Arid): Assay of the Martian Regolith with Neutrons

Arid

报告编号	Final-95-78
来源ID	NTRS_Document_ID: 19990036483
	Assay of the Martian Regolith with Neutrons
	Drake, Darrell M.; Reedy, R.; Jakowsky, B.; Clark, B.; Squyres, S.
英文摘要	Different aspects of assaying Martian regolith using neutrons have been investigated. The epithermal portion of moderated neutrons spectra is dramatically effected by the presence of hydrogen (usually in the form of water). A simple analytic formula has been derived to describe the amplitude of this portion of the neutron spectrum as a function of water concentration. Several demonstration experiments have been performed and modeled with a Monte Carlo code. Results of these experiments generally agreed with the calculations to within 20%. In addition to He-3 detectors, lithium-glass scintillators and U-238 fission ion chambers were investigated to determine their applicability to space experiments.
英文关键词	SPACEBORNE EXPERIMENTS REGOLITH MARS (PLANET) RESEARCH PLANETARY GEOLOGY MARS SURFACE ASSAYING WATER URANIUM 238 SOLID STATE NEUTRON SPECTRA MONTE CARLO METHOD SCINTILLATION COUNTERS LITHIUM IONIZATION CHAMBERS HYDROGEN HELIUM ISOTOPES FISSION
出版年	1998
报告类型	Technical Report
语种	英语
国家	美国
URL	http://hdl.handle.net/2060/19990036483
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/259260
推荐引用方式 GB/T 7714	Drake, Darrell M.,Reedy, R.,Jakowsky, B.,et al. Assay of the Martian Regolith with Neutrons,1998.