Development of deformed intruder structures along the N=50 magic number: Insights from ⁸³Se

@article{pellumaj2026development,
  title = {{Development of deformed intruder structures along the N=50 magic number: Insights from $^83$Se}},
  author = {J Pellumaj and A Gottardo and A Goasduff and J.J Valiente-Dobón and F Conca and D.D Dao and F Nowacki and A Poves and G Benzoni and S Bottoni and D Brugnara and S Capra and M Cicerchia and N Cieplicka-Oryńczak and G Corbari and F.C.L Crespi and G de Angelis and B Fornal and E Gamba and A Gozzelino and J Ha and Y.H Kim and U Köster and S.M Lenzi and S Leoni and M Luciani and T Marchi and N Mǎrginean and R Mǎrginean and R Menegazzo and D Mengoni and C Michelagnoli and C Mihai and B Million and S Nagorny and A Nannini and D.R Napoli and R.M Pérez-Vidal and S Pigliapoco and S Pirro and F Recchia and D Reygadas and K Rezynkina and M Siciliano and M Sferrazza and A Turturica and I Zanon and S Ziliani and G Zhang and S Carturan and M Loriggiola},
  journal = {Physics Letters B},
  year = {2026},
  month = sep,
  doi = {10.1016/j.physletb.2026.140432},
  url = {https://hal.science/hal-05605623v1},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - Development of deformed intruder structures along the N=50 magic number: Insights from ^83Se
AU  - J Pellumaj
AU  - A Gottardo
AU  - A Goasduff
AU  - J.J Valiente-Dobón
AU  - F Conca
AU  - D.D Dao
AU  - F Nowacki
AU  - A Poves
AU  - G Benzoni
AU  - S Bottoni
AU  - D Brugnara
AU  - S Capra
AU  - M Cicerchia
AU  - N Cieplicka-Oryńczak
AU  - G Corbari
AU  - F.C.L Crespi
AU  - G de Angelis
AU  - B Fornal
AU  - E Gamba
AU  - A Gozzelino
AU  - J Ha
AU  - Y.H Kim
AU  - U Köster
AU  - S.M Lenzi
AU  - S Leoni
AU  - M Luciani
AU  - T Marchi
AU  - N Mǎrginean
AU  - R Mǎrginean
AU  - R Menegazzo
AU  - D Mengoni
AU  - C Michelagnoli
AU  - C Mihai
AU  - B Million
AU  - S Nagorny
AU  - A Nannini
AU  - D.R Napoli
AU  - R.M Pérez-Vidal
AU  - S Pigliapoco
AU  - S Pirro
AU  - F Recchia
AU  - D Reygadas
AU  - K Rezynkina
AU  - M Siciliano
AU  - M Sferrazza
AU  - A Turturica
AU  - I Zanon
AU  - S Ziliani
AU  - G Zhang
AU  - S Carturan
AU  - M Loriggiola
PY  - 2026
DA  - 2026/09/28
JO  - Physics Letters B
DO  - 10.1016/j.physletb.2026.140432
UR  - https://hal.science/hal-05605623v1
AB  - The ⁸³Se nucleus was studied in the context of shape coexistence employing a ⁸²Se(d,p)⁸³Se 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 3/23+ 1100-keV low-lying intruder states of ⁸³Se 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 e²fm⁴ were found for the E2 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.
SN  - 0370-2693
SN  - 1873-2445
ER  -