Determination of dead-layer variation in HPGe detectors
The dead layer uniformity of the top surface of two high purity germanium detectors has been studied using a novel automated scanning set-up that allows a fine-grained topography of a detector's top and lateral surfaces. Comparisons between measurements and Monte Carlo simulations allowed implementation of a a dead-layer variation in the detector model, which reproduces the measurements results. The effect of the non-uniform dead-layer on activity determinations based on low-energy γ-rays (i.e. below 100keV) has been determined to be of the order of 10% or more.
ANDREOTTI Erica;
HULT Mikael;
MARISSENS Gerd;
LUTTER Guillaume;
GARFAGNINI A.;
HEMMER S.;
VON STURM K.;
2014-04-14
PERGAMON-ELSEVIER SCIENCE LTD
JRC82733
0969-8043,
http://dx.doi.org/10.1016/j.apradiso.2013.11.046,
https://publications.jrc.ec.europa.eu/repository/handle/JRC82733,
10.1016/j.apradiso.2013.11.046,
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