Radioactivities in returned lunar materials.The difference between the Ar-37 activities from similar locations in the rocks 12002 and 15555 provides direct measures of the Ar-37 activities produced by the 2 November 1969 flare. Differences between the Ar-37 activities in 14321 and 15555 give Ar-37 activities produced by the 24 January 1971 flare. The intensities of the two flares were determined by making use of measured Ar-37 cross sections in simulated lunar material. The depth dependence of tritium in samples and its temperature-release pattern provides information about the sources of the tritium and about the intensity of solar flares integrated over the past 30 years.
Document ID
19730034992
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Fireman, E. L.
D'Amico, J.
Defelice, J.
Spannagel, G. (Smithsonian Astrophysical Observatory Cambridge, Mass., United States)