β-delayed fission of 180Tl

J. Elseviers, A.N. Andreyev, M. Huyse, P. Van Duppen, S. Antalic, A. Barzakh, N. Bree, T.E. Cocolios, V.F. Comas, J. Diriken, D. Fedorov, V.N. Fedosseev, S. Franchoo, L. Ghys, J.A. Heredia, O. Ivanov, U. Köster, B.A. Marsh, K. Nishio, R.D. PageN. Patronis, M.D. Seliverstov, I. Tsekhanovich, P. Van Den Bergh, J. Van De Walle, M. Venhart, S. Vermote, M. Veselský, C. Wagemans

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Abstract

The detailed analysis of the β-delayed fission data of 180Tl is presented. The experiment was performed by producing a pure beam of 180Tl by means of highly selective resonance laser ionization followed by mass separation with the ISOLDE (CERN, Geneva) isotope separator. A surprising asymmetric mass distribution of fission fragments from 180Hg, the daughter of 180Tl β decays, was observed. Here, the energy calibration of the silicon detectors, which is crucial for a proper determination of the fission fragments' energy and mass split, is presented and the total kinetic energy and its dependence on the mass split ratio is discussed. A more precise β-delayed fission probability P180Tl)=3.2(2)×103% was deduced.
Original languageEnglish
Article number044321
JournalPhysical Review C
Volume88
Issue number4
DOIs
Publication statusPublished - 21 Oct 2013

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