Cosmogenic nuclides in football-sized rocks.The activity of long- and short-lived isotopes in a series of samples from a vertical column through the center of rock 14321 was measured. Rock 14321 is a 9 kg fragmental rock whose orientation was photographically documented on the lunar surface. Also investigated was a sample from the lower portion of rock 14310, where, in order to study target effects, two different density fractions (mineral separates) were analyzed. A few nuclides in a sample from the comprehensive fines 14259 were measured. This material has been collected largely from the top centimeter of the lunar soil. The study of the deep samples of 14321 and 14310 provided values for the activity of isotopes at points where only effects produced by galactic cosmic rays are significant.
Document ID
19730034991
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Wahlen, M.
Honda, M.
Imamura, M.
Fruchter, J. S.
Finkel, R. C.
Kohl, C. P.
Arnold, J. R.
Reedy, R. C. (California, University La Jolla, Calif., United States)