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          Institute: MPI für Kernphysik     Collection: Dark Matter Physics     Display Documents



ID: 206984.0, MPI für Kernphysik / Dark Matter Physics
Data acquisition and analysis of the 76Ge double beta experiment in Gran Sasso 1990-2003
Authors:Klapdor-Kleingrothaus, H.V.; Dietz, A.; Krivosheina, I.; Chkvorets, O.
Language:English
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume:522
Issue / Number:3
Start Page:371
End Page:406
Copyright:Copyright © 2003 Elsevier B.V. All rights reserved.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Data acquisition in a long-running underground experiment has its specific experimental challenges, concerning data acquisition, stability of the experiment and background reduction. These problems are addressed here for the HEIDELBERG-MOSCOW experiment, which collected data in the period August 1990-May 2003. The measurement and the analysis of the data are presented. The duty cycle of the experiment was ~80%, and the collected statistics is 71.7 kg year. The background achieved in the energy region of the Q value for double beta decay is 0.11 events/kg year keV. The two-neutrino accompanied half-life is determined on the basis of more than 100 000 events. The confidence level for the neutrinoless signal has been improved to a 4 level.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group D. Schwalm/Non Accelerator Particle Physics (H.V. Klapdor-Kleingrothaus)
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