/ Experiment-HEP hep-ex/0404039


A New Ge-76 double beta decay experiment at LNGS: Letter of intent


Abt, I. ; Altmann, Michael F. ; Bakalyarov, A. ; Barabanov, I. ; Bauer, C. ; Bellotti, E. ; Belyaev, S.T. ; Bezrukov, Leonid B. ; Brudanin, V. ; Buttner, C. ; Bolotsky, V.P. ; Caldwell, A. ; Cattadori, C. ; Clement, H. ; Di Vacri, A. ; Eberth, J. ; Egorov, V. ; Grigoriev, G. ; Gurentsov, V. ; Gusev, K. ; Hampel, W. ; Heusser, G. ; Hofmann, W. ; Jochum, J. ; Junker, M. ; Kiko, J. ; Kirpichnikov, I.V. ; Klimenko, A. ; Knopfle, K.T. ; Kornoukhov, V.N. ; Laubenstein, M. ; Lebedev, V. ; Liu, X. ; Nemchenok, I. ; Pandola, L. ; Sandukovsky, V. ; Schonert, Stefan. ; Scholl, S. ; Schwingenheuer, B. ; Simgen, H. ; Smolnikov, A. ; Tikhomirov, A. ; Vasenko, A.A. ; Vasiliev, S. ; Weisshaar, D. ; Yanovich, E. ; Yurkowski, J. ; Zhukov, S. ; Zuzel, G.

Pages: 67

Abstract: This Letter of Intent has been submitted to the Scientific Committee of the INFN Laboratori Nazionali del Gran Sasso (LNGS) in March 2004. It describes a novel facility at the LNGS to study the double beta decay of 76Ge using an (optionally active) cryogenic fluid shield. The setup will allow to scrutinize with high significance on a short time scale the current evidence for neutrinoless double beta decay of 76Ge using the existing 76Ge diodes from the previous Heidelberg-Moscow and IGEX experiments. An increase in the lifetime limit can be achieved by adding more enriched detectors, remaining thereby background-free up to a few 100 kg-years of exposure.

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