RT Journal Article
T1 The impact of the intruder orbitals on the structure of neutron-rich Ag isotopes
A1 Kim, Y. H.
A1 Biswas, Sayan
A1 Rejmund, M.
A1 Navin, A.
A1 Lemasson, A.
A1 Bhattacharyya, S.
A1 Caamaño Fresco, Manuel
A1 Clément, E.
A1 France, G. de
A1 Jacquot, B.
K1 Ag isotopes
K1 Isotopic identification
K1 Fission fragments
K1 Large isospin and high angular momentum
K1 Signature splitting and inversion
K1 Shell-model
AB The low-lying high-spin yrast band structure of neutron-rich 113,118–121Ag has been established for the first time using prompt γ-ray spectroscopy of isotopically identified fission fragments produced in the 9Be(238U, fγ) fusion-and transfer-induced fission processes. The newly obtained level energies follow the systematics of the neighboring isotopes. The sequences of levels exhibit an energy inheritance from states in the corresponding Cd core. A striking constancy of a large signature splitting in odd-AAg throughout the long chain of isotopes with 50 <N<82and a signature inversion in even-AAg isotopes, which are indications of triaxiality, were evidenced. These observed features were reproduced by large-scale shell-model calculations with a spherical basis for the first time in the Ag isotopic chain, revealing microscopically their complex nature with severely broken seniority ordering. The essential features of the observed signature splitting were further examined in the light of simplified, two-orbital shell-model calculations including only two intruder orbitals πg9/2and νh11/2from two consecutive shells above Z=50and N=82for protons and neutrons respectively, resulting in the πg−39/2×νhm11/2configurations. The newly established bands were understood as fairly pure, built mainly on unique-parity intruder configurations and coupled to the basic states of the Cd core.
PB Elsevier
SN 0370-2693
YR 2017
FD 2017
LK http://hdl.handle.net/10347/22795
UL http://hdl.handle.net/10347/22795
LA eng
NO Kim, Y. H., Biswas, S., Rejmund, M., Navin, A., Lemasson, A., Bhattacharyya, S., ... & Jacquot, B. (2017). The impact of the intruder orbitals on the structure of neutron-rich Ag isotopes. Physics Letters B, 772, 403-408
DS Minerva
RD 22 abr 2026