Surface passivation of high-purity germanium gamma-ray detector

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dc.contributor.authorAlexiev, Den_AU
dc.contributor.authorButcher, KSAen_AU
dc.contributor.authorEdmondson, Men_AU
dc.contributor.authorLawson, EMen_AU
dc.date.accessioned2007-11-22T04:14:22Zen_AU
dc.date.accessioned2010-04-30T04:28:34Zen_AU
dc.date.available2007-11-22T04:14:22Zen_AU
dc.date.available2010-04-30T04:28:34Zen_AU
dc.date.issued1993-01en_AU
dc.description.abstractThe experimental work consists of two parts. The first involves fabrication of hyper-pure germanium gamma ray detectors using standard surface treatment chemical etchings and containment in a suitable cryostat. Then after cooling the detectors to 77 K gamma-ray emissions from radioisotopes are resolved resolution depletion depth VR versus IR characteristics and /NA -ND / of the germanium are measured. The second part of the work involves investigation of surface states in an effort to achieve long-term stability of operating characteristics. Several methods are used: plasma hydrogenation a-Si and a-Ge pinch-off effect and simple oxidation. A-Ge and a-Si thicknesses were measured using Rutherford backscattering techniques; surface states were measured with deep level transient spectroscopy and diode reverse current versus reverse voltage plots. Some scanning electron microscope measurements were used in determining major film contaminants during backscattering of a-Si and a-Ge films. Surface passivation studies revealed unexpected hole trapping defects generated when a-Ge:H film is applied. The a-Si:H films were found to be mechanically strong, no defect traps were found and preliminary results suggest that such films will be good passivants.en_AU
dc.identifier.citationAlexiev, D, Buthcer, K. S. A., Edmondson, M., & Lawson, E. M. (1993). Surface passivation of high-purity germanium gamma-ray detector (ANSTO-E-707). Lucas Heights, N.S.W.: Australian Nuclear Science and Technology Organisation.en_AU
dc.identifier.govdoc128en_AU
dc.identifier.issn10307745en_AU
dc.identifier.otherANSTO-E-707en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/188en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Nuclear Science and Technology Organisationen_AU
dc.subjectPassivationen_AU
dc.subjectSelf-powered gamma detectorsen_AU
dc.subjectSemiconductor devicesen_AU
dc.subjectGermaniumen_AU
dc.titleSurface passivation of high-purity germanium gamma-ray detectoren_AU
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