4 research outputs found

    New Limit for the Half-Life of 2K(2neutrino)-Capture Decay Mode of 78Kr

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    Features of data accumulated at 1817 hours in the experimental search for 2K(2 \nu)-capture decay mode of Kr-78 are discussed. The new limit for this decay half-life is found to be T_{1/2} > 2.3 *10^{20} yr. (90% C.L.).Comment: 7 pages, 4 figures, submitted to Phys. of Atom. Nuc

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

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    A technique to search for 2K-capture of 78^{78}Kr with large low-background proportional counter filled with an enriched in 78^{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^{78}Kr with regard to 2K-capture (T1/2≥6⋅1021_{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 S=1.0⋅1022\texttt{S}=1.0\cdot10^{22} yr (90% C.L.).Comment: 4 pages, 5 figures; talk at the NANP'05 Conference; submitted to Phys. At. Nuc