Double-beta decay of Ca-48 in the TGV experiment

Authors
Brudanin, VB Rukhadze, NI Briancon, C Egorov, VG Kovalenko, VE Kovalik, A Salamatin, AV Tsoupko-Sitnikov, VV Vylov, T Stekl, I
Citation
Vb. Brudanin et al., Double-beta decay of Ca-48 in the TGV experiment, PHYS ATOM N, 63(7), 2000, pp. 1218-1221
Citations number
10
Categorie Soggetti
Physics
Journal title
PHYSICS OF ATOMIC NUCLEI
ISSN journal
10637788 → ACNP
Volume
63
Issue
7
Year of publication
2000
Pages
1218 - 1221
Database
ISI
SICI code
1063-7788(200007)63:7<1218:DDOCIT>2.0.ZU;2-U
Abstract
The low-background, high-sensitivity Ge multidetector spectrometer TGV is u sed to study the double-beta decay of Ca-48. Additional suppression of the recorded background is achieved with neutron shielding and a method for dis tinguishing beta particles from gamma rays by detector-pulse rise time. The estimates T-1/2(beta beta 2 nu) (4.2 +/- 2.4) x 10(19) yr and T-1/2(beta b eta 0 nu) > 1.5 x 10(21) yr (at a 90% C.L.) for the double-beta decay of Ca -48 are obtained. (C) 2000 MAIK "Nauka/Interperiodica ".