Abstract
The technique used in the experiment in the search for the process of 2K2ν-capture in 124Xe using large high-pressure proportional counters is briefly described. The measurements with a xenon sample enriched to 21% (or ~57 g) of the 124Xe isotope carried out for 3340 hours yielded a zero signal. The resultant upper limit on the 124Xe half-life with respect to the 2ν-mode of the nuclear capture of two K-shell electrons amounts to T1/2>4.6 1021 yr at the 90% confidence level.
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Original Russian Text © Yu.M. Gavrilyuk, A.M. Gangapshev, V.V. Kazalov, V.V. Kuzminov, S.I. Panasenko, S.S. Ratkevich, D.A. Tekueva, 2018, published in Fizika Elementarnykh Chastits i Atomnogo Yadra, 2018, Vol. 49, No. 1.
Report at the International Session–Conference on the Physics of Fundamental Interactions (JINR Section, Physics Department, Russian Academy of Sciences), Dubna, April 12–15, 2016.
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Gavrilyuk, Y.M., Gangapshev, A.M., Kazalov, V.V. et al. Search for two-neutrino 2K capture in 124Xe: the method and preliminary results. Phys. Part. Nuclei 49, 36–38 (2018). https://doi.org/10.1134/S1063779618010124
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DOI: https://doi.org/10.1134/S1063779618010124