Improved limits on beta(-) and beta(-) decays of Ca-48

0185694 - UJF-V 20027188 RIV US eng J - Journal Article
Bakalyarov, A. - Balysh, A. - Barabash, AS. - Beneš, P. - Briancon, C. - Brudanin, V. B. - Čermák, P. - Egorov, V. - Hubert, F. - Hubert, P. - Korolev, NA. - Kosjakov, VN. - Kovalík, Alojz - Lebedev, NA. - Novgorodov, A. F. - Rukhadze, NI. - Štekl, NI. - Timkin, VV. - Veleshko, IE. - Vylov, T. - Umatov, VI.
Improved limits on beta(-) and beta(-) decays of Ca-48.
JETP Letters. Roč. 76, č. 9 (2002), s. 545-547. ISSN 0021-3640. E-ISSN 1090-6487
Institutional research plan: CEZ:AV0Z1048901
Keywords : beta decay * double beta decay * Ca-48
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 1.483, year: 2002

New limits on Ca-48 beta(-) and beta(-)beta(-) decays to excited states of Ti-48 have been obtained using a 400 cm(3) low-background HPGe detector and an external source of 24.558 g enriched CaF2 powder (9.822 g of Ca-48). The limits for beta(-) decay to the 6(+) ground state end excited 5(+) and 4(+) states in Sc-48 are 1.6 x 10(20) yr, 2.5 x 10(20) yr, and 1.9 x 10(20) yr at the 90% confidence level. For the beta(-)beta(-) decay to Ti-48, the limits to the firs 2(+), second 2(+), and first 0(+) excited states are 1.8 x 10(20) yr, 1.5 x 10(20) yr, and 1.5 x 10(20) yr, again at the 90% confidence level.
Permanent Link: http://hdl.handle.net/11104/0082077