First Glimpse of the N=82 Shell Closure below Z=50 from Masses of Neutron-Rich Cadmium Isotopes and Isomers. Manea, V., Karthein, J., Atanasov, D., Bender, M., Blaum, K., Cocolios, T., E., Eliseev, S., Herlert, A., Holt, J., D., Huang, W., J., Litvinov, Y., A., Lunney, D., Menéndez, J., Mougeot, M., Neidherr, D., Schweikhard, L., Schwenk, A., Simonis, J., Welker, A., Wienholtz, F., & Zuber, K. Physical Review Letters, 124(9):092502, American Physical Society, 3, 2020.
First Glimpse of the N=82 Shell Closure below Z=50 from Masses of Neutron-Rich Cadmium Isotopes and Isomers [pdf]Paper  First Glimpse of the N=82 Shell Closure below Z=50 from Masses of Neutron-Rich Cadmium Isotopes and Isomers [link]Website  doi  abstract   bibtex   17 downloads  
We probe the N=82 nuclear shell closure by mass measurements of neutron-rich cadmium isotopes with the ISOLTRAP spectrometer at ISOLDE-CERN. The new mass of Cd132 offers the first value of the N=82, two-neutron shell gap below Z=50 and confirms the phenomenon of mutually enhanced magicity at Sn132. Using the recently implemented phase-imaging ion-cyclotron-resonance method, the ordering of the low-lying isomers in Cd129 and their energies are determined. The new experimental findings are used to test large-scale shell-model, mean-field, and beyond-mean-field calculations, as well as the ab initio valence-space in-medium similarity renormalization group.

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