Superallowed α Decay to Doubly Magic 100Sn
- Auranen, K.
- Seweryniak, D.
- Albers, M.
- Ayangeakaa, A. D.
- Bottoni, S.
- Carpenter, M. P.
- Chiara, C. J.
- Copp, P.
- David, H. M.
- Doherty, D. T.
- Harker, J.
- Hoffman, C. R.
- Janssens, R. V. F.
- Khoo, T. L.
- Kuvin, S. A.
- Lauritsen, T.
- Lotay, G.
- Rogers, A. M.
- Sethi, J.
- Scholey, Catherine
- Talwar, R.
- Walters, W. B.
- Woods, P. J.
- Zhu, S.
DOIAbstract
We report the first observation of the Xe108→Te104→Sn100 α-decay chain. The α emitters, Xe108 [Eα=4.4(2) MeV, T1/2=58-23+106 μs] and Te104 [Eα=4.9(2) MeV, T1/2<18 ns], decaying into doubly magic Sn100 were produced using a fusion-evaporation reaction Fe54(Ni58,4n)Xe108, and identified with a recoil mass separator and an implantation-decay correlation technique. This is the first time α radioactivity has been observed to a heavy self-conjugate nucleus. A previous benchmark for study of this fundamental decay mode has been the decay of Po212 into doubly magic Pb208. Enhanced proton-neutron interactions in the N=Z parent nuclei may result in superallowed α decays with reduced α-decay widths significantly greater than that for Po212. From the d...
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