beta-delayed fission of Tl-180

Elseviers, Jytte; Andreyev, AN; Huyse, Mark; Van Duppen, Piet; Antalic, S; Barzakh, A; Bree, Nick; Cocolios, Thomas Elias; Comas, VF; Diriken, Jan; Fedorov, D; Fedosseev, VN; Franchoo, S; Ghys, Lars; Heredia, JA; Ivanov, O; Koester, U; Marsh, BA; Nishio, K; Page, RD; Patronis, N; Seliverstov, MD; Tsekhanovich, I; Van Den Bergh, Piet; De Walle, J Van; Venhart, M; Vermote, S; Veselsky, M; Wagemans, C

doi:10.1103/PhysRevC.88.044321

beta-delayed fission of Tl-180

Author:

Elseviers, Jytte

Andreyev, AN ; Huyse, Mark ; Van Duppen, Piet ; Antalic, S ; Barzakh, A ; Bree, Nick ; Cocolios, Thomas Elias ; Comas, VF ; Diriken, Jan ; Fedorov, D ; Fedosseev, VN ; Franchoo, S ; Ghys, Lars ; Heredia, JA ; Ivanov, O ; Koester, U ; Marsh, BA ; Nishio, K ; Page, RD ; Patronis, N ; Seliverstov, MD ; Tsekhanovich, I ; Van Den Bergh, Piet ; De Walle, J Van ; Venhart, M ; Vermote, S ; Veselsky, M ; Wagemans, C

Keywords:

Science & Technology, Physical Sciences, Physics, Nuclear, Physics, NUCLEAR-FISSION, HEAVY-IONS, BARRIER, MASS, DETECTOR, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics

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 PβDF(180Tl) = 3.2(2) × 10−3% was deduced.