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High-energy proton radiation damage of high-purity germanium detectorsQuantitative studies of radiation damage in high-purity germanium gamma-ray detectors due to high-energy charged particles have been carried out; two 1.0 cm thick planar detectors were irradiated by 6 GeV/c protons. Under proton bombardment, degradation in the energy resolution was found to begin below 7 x 10 to the 7th protons/sq cm and increased proportionately in both detectors until the experiment was terminated at a total flux of 5.7 x 10 to the 8th protons/sq cm, equivalent to about a six year exposure to cosmic-ray protons in space. At the end of the irradiation, the FWHM resolution measured at 1332 keV stood at 8.5 and 13.6 keV, with both detectors of only marginal utility as a spectrometer due to the severe tailing caused by charge trapping. Annealing these detectors after proton damage was found to be much easier than after neutron damage.
Document ID
19780041397
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Pehl, R. H.
(California, University Berkeley, Calif., United States)
Varnell, L. S.
(California Univ. Berkeley. Lawrence Radiation Lab, CA, United States)
Metzger, A. E.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 9, 2013
Publication Date
February 1, 1978
Subject Category
Solid-State Physics
Accession Number
78A25306
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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