Direct observation of the Ba114→Xe110→Te106→Sn102 triple α-decay chain using position and time correlations

L. Capponi, J. F. Smith, P. Ruotsalainen, C. Scholey, P. Rahkila, K. Auranen, L. Bianco, A. J. Boston, H.C. Boston, D.M. Cullen, X. Derkx, M. C. Drummond, T. Grahn, P.T. Greenlees, L. Grocutt, B. Hadinia, U. Jakobsson, D.T. Joss, R. Julin, S. JuutinenM. Labiche, M. Leino, K. G. Leach, C McPeake, K.F. Mulholland, P. Nieminen, David O'Donnell, E.S. Paul, P. Peura, M. Sandzelius, J. Sarén, B. Saygi, J. Sorri, S. Stolze, A. Thornthwaite, M.J. Taylor, J. Uusitalo

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Abstract

The triple α-decay chain Ba114→Xe110→Te106→Sn102 has been directly observed for the first time, following the Ni58(Ni58,2n) reaction. Implantation of Ba114 nuclei into a double-sided silicon-strip detector has allowed their α decays to be correlated in position and time with the α decays of the daughter (Xe110) and granddaughter (Te106) nuclei. In total, 17 events have been assigned to the Ba114→Xe110→Te106→Sn102 triple α-decay chain. The energy of the Ba114 α decay has been measured to be Eα=3480(20) keV, which is 70 keV higher than the previously measured value, and the half-life of Ba114 has been measured with improved accuracy, to be 380+190−110 ms. A revised QC12 value of 19 035(45) keV for Ba114 is presented.
Original languageEnglish
Pages (from-to)024314
JournalPhysical Review C
Volume94
DOIs
Publication statusPublished - 10 Aug 2016

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