Аннотация:
New limits on 48Ca β− and β−β− decays to excited states of 48Ti have been obtained using a 400 cm3 low-background HPGe detector and an external source of 24.558 g enriched CaF2 powder (9.822 g of 48Ca). The limits for β− decay to the 6+ ground state, excited 5+ and 4+ states in 48Sc are 1.6⋅1020 yr, 2.5⋅1020 yr, and 1.9⋅1020 yr at the 90% confidence level. For the β−β− decay to 48Ti the limits to the first 2+, second 2+ and first 0+ excited states are 1.8⋅1020 yr, 1.5⋅1020 yr, and 1.5⋅1020 yr again at the 90% confidence level.
Образец цитирования:
A. Bakalyarov, A. Balysh, A. S. Barabash, P. Benes, Ch. Briancon, V. Brudanin, P. Cermák, V. Egorov, F. Hubert, Ph. Hubert, N. A. Korolev, V. N. Kosjakov, A. Kovalik, N. A. Lebedev, V. I. Lebedev, A. F. Novgorodov, N. I. Rukhadze, I. Štekl, V. Timkin, I. E. Veleshko, Ts. D. Vylov, V. I. Umatov, “Improved limits on β− and β−β− decays of 48Ca”, Письма в ЖЭТФ, 76:9 (2002), 643–644; JETP Letters, 76:9 (2002), 545–547
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