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., . . . Zhu, S. (2018). Superallowed α Decay to Doubly Magic 100Sn. Physical Review Letters, 121(18), Article 182501. https://doi.org/10.1103/physrevlett.121.182501
Published inPhysical Review Letters
Copp, P. |
© 2018 American Physical Society
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 decay chain, we deduce that the α-reduced width for Xe108 or Te104 is more than a factor of 5 larger than that for Po212.
PublisherAmerican Physical Society
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Related funder(s)Academy of Finland
Funding program(s)Centre of Excellence, AoF
Additional information about fundingThis material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contracts No. DE-AC02-06CH11357 (ANL), No. DE-FG02-94ER40834 (UMCP), No. DE-FG02-94ER40848 (UMass Lowell), No. DE-FG02-97ER41041 (UNC), and No. DE-FG02-97ER41033 (TUNL). This research used resources of ANL’s ATLAS facility, which is a DOE Office of Science User Facility. C. S. acknowledges that this work has been supported by the Academy of Finland under the Finnish Center of Excellence Programme (Contract No. 284612). ...
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