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Very heavy solar cosmic rays: Energy spectrum and implications for lunar erosionParticle tracks were investigated in the glass plate of a neutral density (clear flint) optical filter housed in the Surveyor 3 TV camera but exposed directly to space. The track density vs depth curve was determined and descends sharply from approximately 2.6 million tracks/sq cm at a depth of 3.6 mg/sq cm to about 35/sq cm at 700 mg/sq cm. Several tracks were of V-shapes characteristic of high energy induced fission. The erosion rate on the moon due to solar wind ions was determined from the energy spectrum, and was found to be low (0 to 2 x 10 to the minus 8th power cm/yr).
Document ID
19720019112
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Fleischer, R. L.
(General Electric Co. Schenectady, NY, United States)
Hart, H. R., Jr.
(General Electric Co. Schenectady, NY, United States)
Comstock, G. M.
(General Electric Co. Schenectady, NY, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Publication Information
Publication: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12
Subject Category
Space Radiation
Accession Number
72N26762
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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