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

Medium spin states of light N=50 isotones have been populated using fast neutron-induced fission of 232Th. Online prompt γ spectroscopy has been performed using the hybrid γ spectrometer ν-Ball coupled to the LICORNE directional neutron source at ALTO. With the help of γ-γ and γ-γ-γ coincidences and the resolving power of ν-Ball, medium spin states of the neutron-rich nucleus 82Ge have been investigated. 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 on the energy evolution of the N = 50 shell gap toward 78Ni.

THISSE D.;  LEBOIS M.;  VERNEY D.;  WILSON J. N.;  JOVANCEVIC N.;  RUDIGIER Matthias;  CANAVAN Rhiann;  ETASSE D.;  ADSLEY P.;  ALGORA A.;  BABO M.;  BELVEDERE K.;  BENITO J.;  BENZONI G.;  BLAZHEV A.;  BOSO A.;  BOTTONI S.;  BUNCE M.;  CHAKMA R.;  CIEPLICKA-ORYNCZAK N.;  COURTIN S.;  CORTES M. L.;  DAVIES P.;  DELAFOSSE C.;  FALLOT M.;  FORNAL B.;  FRAILE L.M.;  GJESTVANG D.;  GOTTARDO A.;  GUADILLA V.;  GERST R.B.;  HAEFNER G.;  HAUSCHILD K.;  HEINE M.;  HEINRICH C;  HOMM I.;  HOMMET J;  IBRAHIM F.;  ISKRA L.W.;  IVANOV Peter;  JAZWARI S.;  KORGUL A.;  KOSEOGLOU P;  KROELL T.;  KURTUKIAN-NIETO T.;  LE MEUR L.;  LEONI S.;  LJUNGVALL J.;  LOPEZ-MARTENS A.;  LOZEVA R.;  MATEA I.;  MIERNIK K.;  NEMER J.;  OBERSTEDT Stephan;  PAULSEN W.;  PIERSA-SILKOWSKA Monika;  POKLEPA W.;  POPOVITCH Y.;  PORZIO C.;  QI Liqiang;  RALET D.;  REGAN P. H;  REYGADAS-TELLO D.;  REZYNKINA K.;  SANCHEZ-TEMPLEQUE V;  SIEM S.;  SCHMITT C.;  SOEDERSTROEM Per-Anders;  SOLAK K.;  SUERDER C.;  TOCABENS G.;  VEDIA V.;  WARR N.;  WASILEWSKA B.;  WIEDERHOLD J.;  YAVACHOVA M.;  ZEISER F.;  ZILIANI S.; 

2023-07-18

SPRINGER

JRC132695

1434-6001 (online),   

https://link.springer.com/article/10.1140/epja/s10050-023-01051-2,    https://publications.jrc.ec.europa.eu/repository/handle/JRC132695,   

10.1140/epja/s10050-023-01051-2 (online),