We report on spectroscopic information and lifetime measurements of even-even neutron-rich Te isotopes. Excited states were populated in fast-neutron induced fission of U-238 at the ALTO facility of IJCLab with the LICORNE neutron source and detected using the hybrid.-ball spectrometer. We provide first results on lifetimes of the 6(1)(+) state in Te-136 and the (6(1)(+)), (4(1)(+)), and (2(1)(+)) states in Te-138 and discuss the results in the context of large-scale shell-model calculations. The level schemes of Te-136 and Te-138 are revised in terms of lifetimes of their 2(1)(+), 4(1)(+) states and updated information on the (4(2)(+)) state in Te-136 is presented. In addition, previously reported data on spectroscopy and lifetimes in Te-134 are reexamined. This work provides new insights into the evolution of collectivity for Te isotopes with N = 82, 84, 86.
Spectroscopy and lifetime measurements in Te-134,Te-136,Te-138 isotopes and implications for the nuclear structure beyond N=82 / G. Häfner, R. Lozeva, H. Naïdja, M. Lebois, N. Jovančević, D. Thisse, D. Etasse, R.L. Canavan, M. Rudigier, J.N. Wilson, E. Adamska, P. Adsley, M. Babo, K. Belvedere, J. Benito, G. Benzoni, A. Blazhev, A. Boso, S. Bottoni, M. Bunce, R. Chakma, N. Cieplicka-Oryńczak, S.M. Collins, M.L. Cortés, P.J. Davies, C. Delafosse, M. Fallot, B. Fornal, L.M. Fraile, R.-. Gerst, D. Gjestvang, V. Guadilla, K. Hauschild, C. Henrich, I. Homm, F. Ibrahim, Ł.W. Iskra, S. Jazwari, J. Jolie, A. Korgul, P. Koseoglou, T. Kröll, T. Kurtukian-Nieto, L. Le-meur, J. Ljungvall, A. Lopez-Martens, I. Matea, L. Matthieu, K. Miernik, J. Nemer, S. Oberstedt, W. Paulsen, M. Piersa, Y. Popovitch, C. Porzio, L. Qi, D. Ralet, P.H. Regan, D. Reygadas Tello, K. Rezynkina, V. Sanchez, C. Schmitt, P.-. Söderström, C. Sürder, G. Tocabens, V. Vedia, D. Verney, N. Warr, B. Wasilewska, J. Wiederhold, M.S. Yavahchova, F. Zeiser, S. Ziliani. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 103:3(2021 Mar 22).
Spectroscopy and lifetime measurements in Te-134,Te-136,Te-138 isotopes and implications for the nuclear structure beyond N=82
S. Bottoni;C. Porzio;S. Ziliani
2021
Abstract
We report on spectroscopic information and lifetime measurements of even-even neutron-rich Te isotopes. Excited states were populated in fast-neutron induced fission of U-238 at the ALTO facility of IJCLab with the LICORNE neutron source and detected using the hybrid.-ball spectrometer. We provide first results on lifetimes of the 6(1)(+) state in Te-136 and the (6(1)(+)), (4(1)(+)), and (2(1)(+)) states in Te-138 and discuss the results in the context of large-scale shell-model calculations. The level schemes of Te-136 and Te-138 are revised in terms of lifetimes of their 2(1)(+), 4(1)(+) states and updated information on the (4(2)(+)) state in Te-136 is presented. In addition, previously reported data on spectroscopy and lifetimes in Te-134 are reexamined. This work provides new insights into the evolution of collectivity for Te isotopes with N = 82, 84, 86.
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