Proton Shell Evolution below <sup>132</sup>Sn: First Measurement of Low-Lying <i>β</i>-Emitting Isomers in <sup>123,125</sup>Ag
- 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, A.
- 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.
- Moschner, K.
- Niu, C. Y.
- Naqvi, F.
- Niikura, M.
- Nishibata, H.
- Odahara, A.
- Orlandi, R.
- Patel, Z.
- Podolyak, Zs.
- Sumikama, T.
- Söderström, P.-A.
- Sakurai, H.
- Schaffner, H.
- Simpson, G. S.
- Steiger, K.
- Suzuki, H.
- Taprogge, J.
- Takeda, H.
- Vajta, Zs.
- Wang, H. K.
- Wu, J.
- Wendt, A.
- Wang, C. G.
- Wu, H. Y.
- Wang, X.
- Wu, C. G.
- Xu, C.
- Xu, Z. Y.
- Yagi, A.
- Ye, Y. L.
- Yoshinaga, K.
DOIAbstract
The β-delayed γ-ray spectroscopy of neutron-rich 123;125Ag isotopes is investigated at the Radioactive Isotope Beam Factory of RIKEN and the long-predicted 1/2¯ β-emitting isomers in 123;125Ag 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. Shellmodel calculations with the state-of-the-art VMU plus M3Y spin-orbit interaction give a satisfactory description of the low-lying states in 123;125Ag. The tensor force is found to play a crucial role in the evolution of the size of the Z = 40 subshell gap. The observed ...
Add to ORKG