Phys.Rev.Lett. 124, 092502 (2020)

V.Manea, J.Karthein, D.Atanasov, M.Bender, K.Blaum, T.E.Cocolios, S.Eliseev, A.Herlert, J.D.Holt, W.J.Huang, Y.A.Litvinov, D.Lunney, J.Menendez, M.Mougeot, D.Neidherr, L.Schweikhard, A.Schwenk, J.Simonis, A.Welker, F.Wienholtz, K.Zuber

First Glimpse of the N=82 Shell Closure below Z=50 from Masses of Neutron-Rich Cadmium Isotopes and Isomers

ATOMIC MASSES ^{124,126,127,127m,128,129,129m,131,132}Cd; measured mass excesses using phase-imaging ion cyclotron-resonance (PI-ICR) method with the ISOLTRAP spectrometer at ISOLDE-CERN. Cd isotopes were produced in U(p, F), E=1.4 GeV reaction followed by separation of fission fragments using ISOLDE High-resolution separator. Comparison with literature data in AME2016 evaluation, and with large-scale shell-model, mean-field, beyond-mean-field, and ab initio valence-space in-medium similarity renormalization group (VS-IMSRG) calculations. Systematics of S(n) for N=81, 83 and Z=48-68, and for two-neutron shell gaps for N=82, Z=42-70 nuclei.

doi: 10.1103/PhysRevLett.124.092502