Next stage of search for 2K(2$ν$)-capture of $^{78}$Kr

Details Next stage of search for 2K(2$ν$)-capture of $^{78}$Kr Next stage of search for 2K(2$ν$)-capture of $^{78}$Kr

2005-10-26

arxiv.org/abs/nucl-ex/0510070v1

Phys.Atom.Nucl.69:2124-2128,2006

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 5 figures; talk at the NANP'05 Conference; submitted to Phys. At. Nucl

Scientific paper

10.1134/S1063778806120179

A technique to search for 2K-capture of $^{78}$Kr with large low-background proportional counter filled with an enriched in $^{78}$Kr up to 99.8% sample of Krypton at a pressure of 4.51 is described in this paper. The results of first measurements are presented. Analysis of data collected during 159 hours yielded new limit to the half-life of $^{78}$Kr with regard to 2K-capture (T$_{1/2}\geq6\cdot10^{21}$ yr (90% C.L.)). Sensitivity of the facility to the process for one year of measurement was evaluated to be $\texttt{S}=1.0\cdot10^{22}$ yr (90% C.L.).

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