First results for the measurement of double-electron capture of 106Cd in the experiment TGV II |
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| Authors: | I ?tekl P ?ermák P Bene? V B Brudanin K N Gusev V G Egorov A A Klimenko V E Kovalenko A Kovalík N I Rukhadze A V Salamatin V V Timkin Ts Vylov Ch Briançon F ?imkovic |
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| Institution: | (1) Institute of Experimental and Applied Physics, Czech Technical University in Prague, 128 00 Prague, Czech Republic;(2) Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia;(3) Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, 91405 Orsay, France;(4) Comenius University, SK-842 15 Bratislava, Slovakia;(5) Present address: Nuclear Physics Institute of the Academy of Sciences CR, Russia |
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| Abstract: | Present status of the experiment TGV II which is devoted to the measurement of double-beta decay of 106Cd is given. The low background spectrometer TGV II is installed in the Modane Underground Laboratory and has been running
from February 2005 with approx 10 grams of 106Cd enriched at 75%. After an analysis of 3736 hours of experimental data the new improved half-life limit for 2νEC/EC decay of 106Cd (0
g.s.
+
→ 0
g.s.
+
) is given as T
1
2/2ν
> 4.8 × 1019 years (90% CL). The search for 2νEC/EC decay of 106Cd to the excited states of 106Pd allows to determine the limits of the half-lives T
1
2/2ν
(0
g.s.
+
→ 2
1
+
) > 3.9 × 1019 years (90% CL) and T
1
2/2ν
(0
g.s.
+
→ 0
1
+
) > 5.8 × 1019 years (90% CL).
Presented by I. Štekl at the Workshop on calculation of double-beta-decay matrix elements (MEDEX’05), Corfu, Greece, September
26–29, 2005. |
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| Keywords: | double-beta decay double-electron capture cadmium 106 |
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