Radiation Damage Resistance of Reverse Electrode GE Coaxial Detectors

Two high-purity germanium coaxial detectors, having opposite electrode configurations from one another, but fabricated from the same germanium crystal, were irradiated simultaneously with fast neutrons from an unmoderated 252Cf source. Both detectors were 42 mm diam. The detector having the conventi...

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Bibliographic Details
Published inIEEE transactions on nuclear science Vol. 26; no. 1; pp. 321 - 323
Main Authors Pehl, Richard H., Madden, Norman W., Elliott, Jack H., Raudorf, Thomas W., Trammell, Rex C., Darken, Lawrence S.
Format Journal Article
LanguageEnglish
Published IEEE 01.01.1979
Subjects
Coaxial components
Crystalline materials
Electrodes
Gamma ray detection
Gamma ray detectors
Germanium
Laboratories
Neutrons
Protons
Radiation detectors
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ISSN0018-9499
1558-1578
DOI10.1109/TNS.1979.4329652

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Summary:Two high-purity germanium coaxial detectors, having opposite electrode configurations from one another, but fabricated from the same germanium crystal, were irradiated simultaneously with fast neutrons from an unmoderated 252Cf source. Both detectors were 42 mm diam. The detector having the conventional electrode configuration was about 28 times more sensitive to radiation damage than was the detector having the p+ contact on the coaxial periphery. These results prove that germanium coaxial detectors having the conventional electrode configuration should not be used in any situation subject to significant radiation damage. This conclusion was anticipated because the defects produced by neutron and proton irradiation of germanium act predominantly as hole traps.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.1979.4329652