Journal Article

Study of N=50 gap evolution around Z=32: new structure information for 82Ge

Vedia, V., Hommet, J., Algora, A., Jazrawi, S., Siem, S., Piersa-Silkowska, M., Cortés, M. L., Oberstedt, S., Warr, N., Guadilla, V., Qi, L., Courtin, S., Solak, K., Adsley, P., Delafosse, C., Belvedere, K., Henrich, C., Cieplicka-Oryńczak, N., Matea, I., Lozeva, R., Chakma, R., Lebois, M., Wilson, J. N., Benito, J., Fallot, M., Sürder, C., Blazhev, A., Söderström, P. -A., Regan, P. H., Iskra, Ł. W., Porzio, C., Häfner, G., Gjestvang, D., Kröll, T., Homm, I., Wasilewska, B., Koseoglou, P., Schmitt, C., Boso, A., Heine, M., Rudigier, M., Popovitch, Y., Reygadas-Tello, D., Poklepa, W., Ivanov, P., Hauschild, K., Canavan, R., Tocabens, G., Babo, M., Korgul, A., Nemer, J., Sánchez-Tembleque, V., Yavahchova, M., Gerst, R. -B., Etasse, D., Benzoni, G., Fraile, L., Gottardo, A., Lopez-Martens, A., Thisse, D., Paulsen, W., Ralet, D., Ibrahim, F., Verney, D., Jovančević, N., Leoni, S., Kurtukian-Nieto, T., Meur, L. Le, Zeiser, F., Bottoni, S., Fornal, B., Ziliani, S., Rezynkina, K., Ljungvall, J., Davies, P., Bunce, M., Wiederhold, J., Miernik, K.

2023

Overview

Medium spin states of light N = 50 isotones have been populated using fast neutron-induced fission of 232 Th. Online prompt γ  spectroscopy has been performed using the hybrid γ  spectrometer ν - Ball coupled to the LICORNE directional neutron source at the ALTO facility of IJCLab. Medium spin states of the neutron-rich nucleus 82 Ge have been investigated using γ - γ  and γ - γ - γ  coincidence data to exploit the resolving power of ν - 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 78 Ni.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Data acquisition systems / Efficiency / Energy / Experiments / Fast neutrons / Gamma spectroscopy / Hadrons / Heavy Ions / Neutrons / Nuclear Fusion / Nuclear Physics / Particle and Nuclear Physics / Physics / Physics and Astronomy / Regular Article - Experimental Physics / Resolution / Sensors / Spectrum analysis