New stage of search for 2K(2ν) capture of 78Kr

A technique to search for 2K capture of 78Kr with a large low-background proportional counter filled with a sample of krypton enriched in 78Kr up to 99.8% at a pressure of 4.51 atm is described in this paper. The results of first measurements are presented. An analysis of data collected for 159 h yi...

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Bibliographic Details
Published in:Physics of atomic nuclei 2006-12, Vol.69 (12), p.2124-2128
Main Authors: Gavriljuk, Ju. M., Gangapshev, A. M., Gavrin, V. N., Kazalov, V. V., Kuzminov, V. V., Osetrova, N. Ya, Panasenko, S. I., Pul’nikov, I. I., Ratkevich, S. S., Ryabukhin, A. V., Shubin, A. N., Skorynin, G. V.
Format: Article
Language:English
Subjects:
Krypton
Proportional counters
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Summary:A technique to search for 2K capture of 78Kr with a large low-background proportional counter filled with a sample of krypton enriched in 78Kr up to 99.8% at a pressure of 4.51 atm is described in this paper. The results of first measurements are presented. An analysis of data collected for 159 h yielded a new limit to the half-life of 78Kr with regard to 2K capture (T1/2 ≥ 1.5 × 1021 yr (90% C.L.)). The sensitivity of the facility to the process for one year of measurement was evaluated to be S = 1.0 × 1022 yr (90% C.L.).
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778806120179