The operation near liquid helium temperature of a gold-barrier hyper-pure germanium detector for gamma-rays

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dc.contributor.authorLawson, EMen_AU
dc.contributor.authorTavendale, AJen_AU
dc.date.accessioned2007-11-22T04:33:49Zen_AU
dc.date.accessioned2010-04-30T04:41:43Zen_AU
dc.date.available2007-11-22T04:33:49Zen_AU
dc.date.available2010-04-30T04:41:43Zen_AU
dc.date.issued1971-02en_AU
dc.description.abstractDiode characteristics and spectral response to 137Cs γ-rays of a gold-barrier detector made from hyper-pure germanium (net donor concentration 3 x 10 11cm-3) were examined over the temperature range 5 -78°K. Trapping at the primary shallow donor is believed responsible for poor energy resolution at low temperatures. At 5°K a best resolution of 10 keV FWHM was obtained. Efficiency measurements indicate no change in depletion depth on cooling to 5°K with constant bias, in contrast to capacitance measurements. The latter variation, however, can be explained in terms of the response of the detector equivalent circuit to bridge frequency and carrier freeze-out effects. Field-assisted de-trapping at the primary shallow donors is believed responsible for the temperature independent depletion depth and an improvement in resolution with bias in the low temperature carrier freeze-out region (< 10°K).en_AU
dc.identifier.citationLawson, E. M., & Tavendale, A. J. (1971). The operation near liquid helium temperature of a gold-barrier hyper-pure germanium detector for gamma-rays. (AAEC/TM584). Lucas Heights, NSW: Australian Atomic Energy Commission.en_AU
dc.identifier.govdoc881en_AU
dc.identifier.isbn064299403Xen_AU
dc.identifier.otherAAEC-TM-584en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/872en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectHeliumen_AU
dc.subjectGE semiconductor detectorsen_AU
dc.subjectCosmic photonsen_AU
dc.subjectOperationen_AU
dc.titleThe operation near liquid helium temperature of a gold-barrier hyper-pure germanium detector for gamma-raysen_AU
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