On the alpha activity of natural tungsten isotopes

Abstract

The indication for the alpha decay of 180-W with a half-life T1/2=1.1+0.8-0.4(stat)+-0.3(syst)x10^18 yr has been observed for the first time with the help of the super-low background 116-CdWO_4 crystal scintillators. In conservative approach the lower limit on half-life of 180-W has been established as T1/2>0.7x10^18 yr at 90% C.L. Besides, new T1/2 bounds were set for alpha decay of 182-W, 183-W, 184-W and 186-W at the level of 10^20 yr.

16 pages, 8 figures, accepted in Phys. Rev. C

References in corpus (4)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• The event generator DECAY4 for simulation of double beta processes and decay of radioactive nuclei
• Quest for double beta decay of 160-Gd and Ce isotopes
• New results of 116Cd double beta decay study with 116CdWO4 scintillators

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