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Thermal property measurements on lunar material returned by Apollo 11 and 12 missions.Measurement of thermal diffusivity on Apollo 11 type A and type C samples in the temperature range between 150 and 440 K under atmospheric pressure. Thermal diffusivity of type C material is lower and less temperature-dependent than type A material. Both types of samples exhibit lower thermal diffusivities than nonporous terrestrial basalt. The rate of heat generation of Apollo 11 and 12 samples was calculated from the concentrations of radioactive elements: potassium, thorium, and uranium. Apollo 11 crystalline rocks show an average rate of heat generation which is not significantly different from terrestrial basalt. The Th/U ratio does not differ greatly from chondritic and terrestrial averages.
Document ID
19720043668
Acquisition Source
Legacy CDMS
Document Type
Other - Collected Works
Authors
Horai, K.-I.
Simmons, G.
(MIT Cambridge, Mass., United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Subject Category
Space Sciences
Accession Number
72A27334
Funding Number(s)
CONTRACT_GRANT: NAS9-8102
CONTRACT_GRANT: NSR-09-051-001
Distribution Limits
Public
Copyright
Other

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