-delayed fission of Tl

Tlの崩壊遅延核分裂

Elseviers, J.*; Andreyev, A. N.*; Huyse, M.*; Van Duppen, P.*; Antalic, S.*; Barzakh, A.*; Bree, N.*; Cocolios, T. E.*; Comas, V. F.*; Diriken, J.*; Fedorov, D.*; Fedosseev, V. N.*; Franchoo, S.*; Ghys, L.*; Heredia, J. A.*; Ivanov, O.*; Kster, U.*; Marsh, B. A.*; 西尾 勝久   ; Page, R. D.*; Patronis, N.*; Seliverstov, M. D.*; Tsekhanovich, I.*; Van den Bergh, P.*; Van De Walle, J.*; Venhart, M.*; Vermote, S.*; Veselsk, M.*; Wagemans, C.*

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

The detailed analysis of the -delayed fission data of Tl is presented. The experiment was performed by producing a pure beam of Tl by means of highly selective resonance laser ionization followed by mass separation with the ISOLDE isotope separator. A surprising asymmetric mass distribution of fission fragments from Hg, the daughter of Tl decays, was obtained. 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 -delayed fission probability of 3.2(2)10 was deduced.