Medium spin states of light N = 50 isotones have been populated using fast neutron-induced fission of Th-232. Online prompt gamma spectroscopy has been performed using the hybrid gamma spectrometer nu-Ball coupled to the LICORNE directional neutron source at the ALTO facility of IJCLab. Medium spin states of the neutron-rich nucleus Ge-82 have been investigated using gamma-gamma and gamma-gamma-gamma coincidence data to exploit the resolving power of nu-Ball. Two new transitions were assigned to this nucleus and a new level was placed in the level scheme. We tentatively assigned to this new state a (7(+)) spin-parity, which is interpreted as a new N = 50 core breaking state. This provides further insight into the energy evolution of the N = 50 shell gap toward Ni-78.
Study of N= 50 gap evolution around Z= 32 : new structure information for 82 Ge / D. Thisse, M. Lebois, D. Verney, J.N. Wilson, N. Jovancevic, M. Rudigier, R. Canavan, D. Etasse, P. Adsley, A. Algora, M. Babo, K. Belvedere, J. Benito, G. Benzoni, A. Blazhev, A. Boso, S. Bottoni, M. Bunce, R. Chakma, N. Cieplicka-Orynczak, S. Courtin, M.L. Cortes, P. Davies, C. Delafosse, M. Fallot, B. Fornal, L. Fraile, D. Gjestvang, A. Gottardo, V. Guadilla, R.-. Gerst, G. Hafner, K. Hauschild, M. Heine, C. Henrich, I. Homm, J. Hommet, F. Ibrahim, L.W. Iskra, P. Ivanov, S. Jazrawi, A. Korgul, P. Koseoglou, T. Kroll, T. Kurtukian-Nieto, L.L. Meur, S. Leoni, J. Ljungvall, A. Lopez-Martens, R. Lozeva, I. Matea, K. Miernik, J. Nemer, S. Oberstedt, W. Paulsen, M. Piersa-Silkowska, W. Poklepa, Y. Popovitch, C. Porzio, L. Qi, D. Ralet, P.H. Regan, D. Reygadas-Tello, K. Rezynkina, V. Sanchez-Tembleque, S. Siem, C. Schmitt, P.-. Soderstrom, K. Solak, C. Surder, G. Tocabens, V. Vedia, N. Warr, B. Wasilewska, J. Wiederhold, M. Yavahchova, F. Zeiser, S. Ziliani. - In: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI. - ISSN 1434-6001. - 59:7(2023 Jul 11), pp. 153.1-153.13. [10.1140/epja/s10050-023-01051-2]
Study of N= 50 gap evolution around Z= 32 : new structure information for 82 Ge
S. Bottoni;S. Leoni;
2023
Abstract
Medium spin states of light N = 50 isotones have been populated using fast neutron-induced fission of Th-232. Online prompt gamma spectroscopy has been performed using the hybrid gamma spectrometer nu-Ball coupled to the LICORNE directional neutron source at the ALTO facility of IJCLab. Medium spin states of the neutron-rich nucleus Ge-82 have been investigated using gamma-gamma and gamma-gamma-gamma coincidence data to exploit the resolving power of nu-Ball. Two new transitions were assigned to this nucleus and a new level was placed in the level scheme. We tentatively assigned to this new state a (7(+)) spin-parity, which is interpreted as a new N = 50 core breaking state. This provides further insight into the energy evolution of the N = 50 shell gap toward Ni-78.
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