β decay and β-delayed neutron decay of the = 82 nucleus 13149In82

R. Dunlop*, C.E. Svensson, C. Andreoiu, G.C. Ball, N. Bernier, H. Bidaman, V. Bildstein, M. Bowry, D.S. Cross, I. Dillmann, M.R. Dunlop, F.H. Garcia, A.B. Garnsworthy, P.E. Garrett, G. Hackman, J. Henderson, J. Measures, D. Mücher, B. Olaizola, K. OrtnerJ. Park, C.M. Petrache, J.L. Pore, J.K. Smith, D. Southall, M. Ticu, J. Turko, K. Whitmore, T. Zidar

*Corresponding author for this work

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Abstract

The half-lives of three β-decaying states of 13149In82 have been measured with the GRIFFIN γ-ray spectrometer at the TRIUMF-ISAC facility to be T1/2 (1/2-) = 328 (15) ms, T1/2(9/2+) = 265 (8) ms, and T1/2 (21/2+) = 323 (55) ms, respectively. The first observation of γ rays following the βn decay of 131In into 130Sn is reported. The β-delayed neutron emission probability is determined to be P1n = 12(7) % for the 21/2+ state and 2.3(3)% from the combined 1/2- and 9/2+ states of 13149In82 observed in this experiment. A significant expansion of the decay scheme of 131In, including 17 new excited states and 35 new γ-ray transitions in 13150Sn81 is also reported. This leads to large changes in the deduced β-branching ratios to some of the low-lying states of 131Sn compared to previous work with implications for the strength of the first-forbidden β transitions in the vicinity of doubly magic 13250Sn82.
Original languageEnglish
Article number045805
Number of pages14
JournalPhysical Review C
Volume99
Issue number4
DOIs
Publication statusPublished - 26 Apr 2019
Externally publishedYes

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