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          Institute: MPI für Kernphysik     Collection: Neutrino Physics     Display Documents

ID: 510636.0, MPI für Kernphysik / Neutrino Physics
Pulse shape analysis to reduce the background of BEGe detectors
Authors:Andreotti, Erica; Budjas, Dusan; Gonzalez de Orduna, Raquel; Hult, Mikael; Misiaszek, Marcin; Schönert, Stefan
Date of Publication (YYYY-MM-DD):2010-08-19
Title of Journal:Journal of Radioanalytical and Nuclear Chemistry
Issue / Number:2
Start Page:477
End Page:482
Review Status:not specified
Audience:Experts Only
Abstract / Description:A simple technique for pulse shape discrimination in HPGe-detectors of the so-called BEGe type, based on just one parameter obtained from one signal read out, is presented here. This technique allows discriminating between pulses generated when the deposited energy is located within a small region of about 1 mm3 from the pulses generated when the energy is deposited at different locations several mm or cm apart. Two possible applications using this technique are: (i) experiments that look for neutrinoless double beta decay in 76Ge, such as GERDA; (ii) gamma spectrometry measurements where the Compton continuum can be reduced and the efficiency for cascading gamma-rays can remain high. With this active background reduction technique a Compton suppression factor of about 3 was obtained. The detector response may be influenced by the detector size. The detector used for this study had a diameter of 6 cm, a thickness of 2.6 cm and a relative efficiency of 19%. The results obtained with this detector were consistent with the results obtained by Budjáš et al. [J Instrum 4:10, 2009] with a 50% relative efficiency BEGe detector.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group of M. Lindner
External Affiliations:European Commission, Joint Research Centre, Institute
for Reference Materials and Measurements, Retieseweg 111,
2440 Geel, Belgium

M.Smoluchowski Institute of Physics, Jagiellonian University, ul. Reymonta 4, 30-059 Krakow, Poland
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