Low-background Multi-HPGe Spectrometer TGV II used for the study of double electron capture of Cd-106

0339539 - ÚJF 2010 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Štekl, I. - Bocarov, V. - Briancon, Ch. - Brudanin, V. B. - Čermák, P. - Egorov, V. G. - Klimenko, A. A. - Kovalík, Alojz - Mamedov, F. - Rukhadze, N. I. - Sandukovski, V. G. - Shitov, Yu. A. - Simkovic, F. - Timkin, V. V. - Vylov, Ts. - Zinatulina, D. R.
Low-background Multi-HPGe Spectrometer TGV II used for the study of double electron capture of Cd-106.
2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008 NSS/MIC). VOLS 1-9. NEW YORK: IEEE, 2009, s. 1074-1076. IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD. ISBN 978-1-4244-2714-7. ISSN 1082-3654.
[IEEE Nuclear Science Symposium/Medical Imaging Conference. Dresden (DE), 19.10.2008-25.10.2008]
Grant CEP: GA MŠMT(CZ) LA08002; GA MŠMT LC07050
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: DOUBLE-BETA-DECAY * DOUBLE-ELECTRON-CAPTURE * Cd-106
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače

The TGV II (Telescope Germanium Vertical) facility is a low background spectrometer operated in Modane Underground Laboratory (France). It aims at the study of double beta electron capture of Cd-106. The spectrometer is composed of 32 HPGe planar detectors (total mass of Ge similar to 3 kg) interleaved with thin-foil samples made of enriched Cd-106. In 2007 the Phase I of the experiment (1 year measurement) was finished and the new limit on half-life for two-neutrino double electron capture (g.s. -> g.s.) of Cd-106 was obtained as 3.2 x 10(20) years. This limit is significantly higher (by almost three orders of magnitude) than those already published. From December 2007 the Phase II of the experiment continues with more enriched material (13.6 grams instead of 8 grams) and with significantly suppressed background of the cryostat.
Trvalý link: http://hdl.handle.net/11104/0183039