Title: Determination of homogeneity of the top surface deadlayer in an old HPGe detector
Authors: HULT MIKAELGEELEN STEFSTALS MARKLUTTER GUILLAUMEMARISSENS GERDSTROH HEIKOSCHREURS S.SCHROEYERS W.BRUGGEMAN MICHELVERHEYEN L.
Citation: APPLIED RADIATION AND ISOTOPES vol. 147 p. 182-188
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2019
JRC N°: JRC114574
ISSN: 0969-8043 (online)
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC114574
DOI: 10.1016/j.apradiso.2019.02.019
Type: Articles in periodicals and books
Abstract: A collimated source of 241Am was scanned over the endcap of a 21 year old coaxial HPGe-detector that had spent about 75% of its life at room temperature (and the remaining time at 77 K). The detector response was recorded and used as a measure of the relative thickness of the top deadlayer. This thickness was not homogeneous and was thicker near to the outer surface of the crystal compared to the centre, which could be a result of increased diffusion of Li atoms during times the detector was kept at room temperature. The results were compared with two newer HPGe-detectors that proved to have homogeneous top deadlayers.
JRC Directorate:Nuclear Safety and Security

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