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Measurements of cosmogenic nuclides in lunar rock 64455Eleven samples were ground from the glass coated surface of lunar rock 64455,82 with an average depth resolution of 50 microns and were measured for Be-10, Al-26, and Cl-36 using AMS (accelerator mass spectrometry). Results show no evidence of SCR (solar cosmic ray) effects. The flat cosmogenic nuclide profiles and activity levels are consistent with a 2 My exposure history for the rock and a sample location on the bottom of the rock. These AMS measurements are some of the most precise ever obtained for these three nuclides. This precision and the demonstrated fine depth resolution will enable us to conduct a number of detailed studies of depth effects in lunar and meteoritic samples, including investigating SCR effects in the surface exposed top of the glass coating of 64455 and possibly in the underlying rock.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Arnold, J. R.
(California Univ., San Diego La Jolla, CA, United States)
Kohl, C. P.
(California Univ., San Diego La Jolla, CA, United States)
Nishiizumi, K.
(California Univ. Berkeley., United States)
Caffee, M. W.
(Lawrence Livermore National Lab. CA., United States)
Finkel, R. C.
(Lawrence Livermore National Lab. CA., United States)
Southon, J. R.
(Lawrence Livermore National Lab. CA., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F
Subject Category
Lunar And Planetary Exploration
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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