Development of deformed intruder structures along the N=50 magic number: Insights from 83Se
Year: 2026
Type: article
Abstract: The 83 Se nucleus was studied in the context of shape coexistence employing a 82 Se(d,p) 83 Se reaction performed in inverse kinematics with the GALILEO-II + SPIDER setup to reach the desired selectivity on the reaction channel of interest via γ -particle coincidences. The lifetimes of the 1/2 + 540-keV and 3/2 3 + 1100-keV low-lying intruder states of 83 Se were measured for the first time by employing the Recoil Distance Doppler Shift and the Doppler Shift Attenuation Method. The deduced transition probabilities, together with the mixing ratios obtained from a separate neutron-capture experiment performed at ILL with the FIPPS array, are compared and discussed in the framework of shell-model calculations performed with the PFSDG-U Hamiltonian. Large transition probabilities of hundreds of e 2 fm 4 were found for the E 2 decays of the states built on top of the intruders, pointing to the development of quadrupole collectivity and large deformation in the proximity of N = 50 shell closure.
Source: Physics Letters B
Authors: J. Pellumaj, A. Gottardo, A. Goasduff, J.J. Valiente-Dobón, F. Conca, D.D. Dao, F. Nowacki, A. Poves, G. Benzoni, S. Bottoni, D. Brugnara, S. Capra, M. Cicerchia, N. Cieplicka-Oryńczak, G. Corbari, F.C.L. Crespi, G. De Angelis, B. Fornal, E. Gamba, A. Gozzelino, J. Ha, Y.H. Kim, U. Köster, S.M. Lenzi, S. Leoni, M. Luciani, T. Marchi, N. Mǎrginean, R. Mǎrginean, R. Menegazzo, D. Mengoni, C. Michelagnoli, C. Mihai, B. Million, S. Nagorny, A. Nannini, D.R. Napoli, R.M. Pérez-Vidal, S. Pigliapoco, S. Pirro, F. Recchia, D. Reygadas, K. Rezynkina, M. Siciliano, M. Sferrazza, A. Turturica, I. Zanon, S. Ziliani, G. Zhang, S. Carturan, M. Loriggiola
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G1047231290, G1175115578, G1275292511, G1315157267, G1422035950, G1760870335, G2262748287, G2287611682, G262962599, G2822340729, G2896472831, G300979063, G3176647223, G3220251042, G3367111595, G34346518, G3480869486, G3565621276, G3857581125, G4014979219, G425668148, G4526231891, G464105488, G498139845, G5080475149, G5222023348, G6848031779, G6918803902, G7084143925, G7261795708, G792975244, G8789427271, G969889393, G993149817
OpenAlex ID: W7151468658