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LArGe: Background suppression using liquid argon (LAr) scintillation for 0vbb decay search with enriched germanium (Ge) detectors

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Di Marco,  M.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Peiffer,  P.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Schoenert,  S.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Citation

Di Marco, M., Peiffer, P., & Schoenert, S. (2007). LArGe: Background suppression using liquid argon (LAr) scintillation for 0vbb decay search with enriched germanium (Ge) detectors.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-7C15-B
Abstract
Measurements with a bare p-type high purity germanium diode (HPGe) submerged in a 19 kg liquid argon (LAr) scintillation detector at MPIK Heidelberg are reported. The liquid argon--germanium system (LArGe) is operated as a 4$\pi$ anti-Compton spectrometer to suppress backgrounds in the HPGe. This R&D is carried out in the framework of the GERDA experiment which searches for 0$\nu\beta\beta$ decays with HPGe detectors enriched in $^{76}$Ge. The goal of this work is to develop a novel method to discriminate backgrounds in 0$\nu\beta\beta$ search which would ultimately allow to investigate the effective neutrino mass free of background events down to the inverse mass hierarchy scale. Other applications in low-background counting are expected.