title: Determination of dead-layer variation in HPGe detectors.
abstract: 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 dead-layer variation into 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 ~100 keV) has been determined to be of the order of 10% or more.
authors: EC-JRC-IRMM, Retieseweg 111, Geel B-2440, Belgium. Electronic address: ericaand@libero.it.
authors: E
authors: E
authors: Andreotti
authors: EC-JRC-IRMM, Retieseweg 111, Geel B-2440, Belgium.
authors: M
authors: M
authors: Hult
authors: EC-JRC-IRMM, Retieseweg 111, Geel B-2440, Belgium.
authors: G
authors: G
authors: Marissens
authors: EC-JRC-IRMM, Retieseweg 111, Geel B-2440, Belgium.
authors: G
authors: G
authors: Lutter
authors: Dipartimento di Fisica e Astronomia dell`Università di Padova, via Marzolo 8, I-35131, Padova, Italy; INFN Padova, Padova, Italy.
authors: A
authors: A
authors: Garfagnini
authors: Dipartimento di Fisica e Astronomia dell`Università di Padova, via Marzolo 8, I-35131, Padova, Italy; INFN Padova, Padova, Italy.
authors: S
authors: S
authors: Hemmer
authors: Dipartimento di Fisica e Astronomia dell`Università di Padova, via Marzolo 8, I-35131, Padova, Italy; INFN Padova, Padova, Italy.
authors: K
authors: K
authors: von Sturm
keywords: Dead-layer; HPGe detectors; γ-ray Spectrometry