Superallowed α Decay to Doubly MagicSn100

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, C.; Talwar, R.; Walters, W. B.; Woods, P. J.; Zhu, S.

doi:10.1103/PhysRevLett.121.182501

Title: Superallowed $α$ Decay to Doubly Magic ${}^{100}{Sn}$

Journal Article · 30 October 2018 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.121.182501 · OSTI ID:1484239

Auranen, K. ^[1]; Seweryniak, D. ^[1]; Albers, M. ^[1]; Ayangeakaa, A. D. ^[1]; Bottoni, S. ^[1]; Carpenter, M. P. ^[1]; Chiara, C. J. ^[2]; Copp, P. ^[3]; David, H. M. ^[1]; Doherty, D. T. ^[4]; Harker, J. ^[2]; Hoffman, C. R. ^[1]; Janssens, R. V. F. ^[5]; Khoo, T. L. ^[1]; Kuvin, S. A. ^[6]; Lauritsen, T. ^[1]; Lotay, G. ^[7]; Rogers, A. M. ^[1]; Sethi, J. ^[2]; Scholey, C. ^[8] more »

Argonne National Lab. (ANL), Argonne, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Massachusetts, Lowell, MA (United States)
Univ. of Edinburgh, Scotland (United Kingdom)
Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Connecticut, Storrs, CT (United States)
Univ. of Surrey, Guildford (United Kingdom)
University of Jyvaskyla (Finland)
Univ. of Maryland, College Park, MD (United States)

In this paper, we report the first observation of the ¹⁰⁸Xe → ¹⁰⁴Te → ¹⁰⁰Sn α-decay chain. The α emitters, ¹⁰⁸Xe [E_α = 4.4(2) MeV, T_1/2 = 58^{$+106 -23$} μs] and ¹⁰⁴Te[E_α = 4.9(2) MeV, T_1/2 < 18 ns], decaying into doubly magic ¹⁰⁰Sn were produced using a fusion-evaporation reaction ⁵⁴Fe(⁵⁸Ni, 4n)¹⁰⁸Xe, and identified with a recoil mass separator and an implantation-decay correlation technique. This is the first time alpha 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 ²¹²Po into doubly magic ²⁰⁸Pb. 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 ²¹²Po. Finally, from the decay chain, we deduce that the α-reduced width for ¹⁰⁸Xe or ¹⁰⁴Te is more than a factor of 5 larger than that for ²¹²Po.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC02-06CH11357; FG02-94ER40834; FG02-94ER40848; FG02-97ER41033; FG02-97ER41041

OSTI ID:: 1484239

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 121; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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