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Phys. Rev. C 67, 014310 (2003) [8 pages]

α activity of natural tungsten isotopes

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F. A. Danevich, A. Sh. Georgadze, V. V. Kobychev*, S. S. Nagorny, A. S. Nikolaiko, O. A. Ponkratenko, V. I. Tretyak, S. Yu. Zdesenko, and Yu. G. Zdesenko†
Institute for Nuclear Research, MSP 03680 Kiev, Ukraine

P. G. Bizzeti, T. F. Fazzini, and P. R. Maurenzig
Dipartimento di Fisica, Universitá di Firenze and INFN, I-50019 Firenze, Italy

Received 29 April 2002; published 22 January 2003

The indication for the α decay of 180W with a half-life T1/2α=1.1-0.4+0.8(stat)±0.3(syst)×1018 yr has been observed for the first time with the help of the superlow background 116CdWO4 crystal scintillators. In a conservative approach the lower limit on half-life of 180W has been established as T1/2α(180W)>~0.7×1018 yr at 90% C.L. In addition, new T1/2α bounds were set for α decay of 182W,183W,184W, and 186W at the level of 1020 yr.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.67.014310
DOI:
10.1103/PhysRevC.67.014310
PACS:
23.60.+e, 29.40.Mc

*Present address: INFN, Laboratori Nazionali del Gran Sasso, I-67010 Assergi (AQ), Italy.

†Corresponding author. Email address: zdesenko@kinr.kiev.ua

 
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