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Título: | Proton Shell Evolution below Sn 132: First Measurement of Low-Lying β -Emitting Isomers in Ag 123,125 |
Autor: | Chen, Z. Q.; Li, Z.H.; Hua, H.; Watanabe, H.; Yuan, C. X.; Zhang, S. Q.; Lorusso, G.; Nishimura, S.; Baba, H.; Browne, F.; Benzoni, G.; Chae, K.Y.; Crespi, F.C.L.; Doornenbal, P.; Fukuda, N.; Gey, G.; Gernhäuser, R.; Inabe, N.; Isobe, T.; Jiang, D. X.; Jungclaus, Andrea CSIC ORCID; Jung, H. S.; Jin, Y.; Kameda, D.; Kim, G. D.; Kim, Y. K.; Kojouharov, I.; Kondev, F.G.; Kubo, T.; Kurz, N.; Kwon, Y. K.; Li, X. Q.; Lou, J. L.; Lane, G.J.; Li, C. G.; Luo, D. W.; Montaner-Pizá, A. CSIC; Moschner, K.; Niu, C. Y.; Naqvi, F.; Niikura, M.; Nishibata, H.; Odahara, A.; Orlandi, R. CSIC ORCID; Patel, Z.; Podolyák, Z.; Sumikama, T.; Söderström, P.A.; Sakurai, H.; Taprogge, J. CSIC ORCID | Fecha de publicación: | 28-may-2019 | Editor: | American Physical Society | Citación: | Physical Review Letters 122: 212502 (2019) | Resumen: | The β-delayed γ-ray spectroscopy of neutron-rich Ag123,125 isotopes is investigated at the Radioactive Isotope Beam Factory of RIKEN, and the long-predicted 1/2- β-emitting isomers in Ag123,125 are identified for the first time. With the new experimental results, the systematic trend of energy spacing between the lowest 9/2+ and 1/2- levels is extended in Ag isotopes up to N=78, providing a clear signal for the reduction of the Z=40 subshell gap in Ag towards N=82. Shell-model calculations with the state-of-the-art VMU plus M3Y spin-orbit interaction give a satisfactory description of the low-lying states in Ag123,125. The tensor force is found to play a crucial role in the evolution of the size of the Z=40 subshell gap. The observed inversion of the single-particle levels around Ag123 can be well interpreted in terms of the monopole shift of the π1g9/2 orbitals mainly caused by the increasing occupation of ν1h11/2 orbitals. | Descripción: | 6 pags., 5 figs. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.122.212502 | URI: | http://hdl.handle.net/10261/204445 | DOI: | 10.1103/PhysRevLett.122.212502 | Identificadores: | doi: 10.1103/PhysRevLett.122.212502 issn: 1079-7114 |
Aparece en las colecciones: | (CFMAC-IEM) Artículos (IFIC) Artículos |
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