Interpretation of various radiation backgrounds observed in the gamma-ray spectrometer experiments carried on the Apollo missions and implications for diffuse gamma-ray measurementsSince the report of a preliminary analysis of cosmic gamma-ray measurements made during the Apollo 15 mission, an improved calculation of the spallation activation contribution has been made including the effects of short-lived spallation fragments, which can extend the correction to 15 MeV. In addition, a difference between Apollo 15 and 16 data enables an electron bremsstrahlung contribution to be calculated. A high level of activation observed in a crystal returned on Apollo 17 indicates a background contribution from secondary neutrons. These calculations and observations enable an improved extraction of spurious components and suggest important improvements for future detectors.
Document ID
19760043886
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Dyer, C. S. (Computer Sciences Corp. Silver Spring, MD, United States)
Trombka, J. I. (NASA Goddard Space Flight Center Greenbelt, Md., United States)
Metzger, A. E. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Seltzer, S. M. (National Bureau of Standards Washington, D.C., United States)
Bielefeld, M. J. (Computer Sciences Corp. Silver Spring, MD, United States)
Evans, L. G. (Computer Science Corp. Silver Spring, Md., United States)