Predicted versus observed cosmic-ray-produced noble gases in lunar samples - Improved Kr production ratiosNew sets of cross sections for the production of krypton isotopes from targets of Rb, Sr, Y, and Zr have been constructed primarily on the bases of experimental excitation functions for Kr production from Y. These cross sections were used to calculate galactic-cosmic-ray and solar-proton production rates for Kr isotopes in the moon. The paper reports spallation Kr data obtained from ilmenite separates of rocks 10017 and 10047. Production rates and isotopic ratios for cosmogenic Kr observed in ten well-documented lunar samples and in ilmenite separates and bulk samples from several lunar rocks with long but unknown irradiation histories were compared with predicted rates and ratios. The agreements were generally quite good.
Document ID
19800039473
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Regnier, S. (Bordeaux I, Universite Gradignam, Gironde, France)
Hohenberg, C. M. (Washington University St. Louis, Mo., United States)
Marti, K. (California, University San Diego, Calif., United States)
Reedy, R. C. (California, University Los Alamos Scientific Laboratory, Los Alamos, N. Mex., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1979
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
LA-UR-79-1582CONF-790381-2
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 19, 1979
End Date: March 23, 1979
Accession Number
80A23643
Funding Number(s)
CONTRACT_GRANT: NSG-07-016 CONTRACT_GRANT: NASA ORDER W-14084 CONTRACT_GRANT: NSG-05-009-150