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Título: | Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in <sup>127</sup>Ag |
Autor: | Watanabe, H.; Yuan, C. X.; Lorusso, G.; Nishimura, S.; Xu, Z. Y.; Sumikama, T.; Söderström, P. A.; Doornenbal, P.; Browne, F.; Gey, G.; Jung, H. S.; Taprogge, J. CSIC ORCID; Vajta, Zs; Wang, H. K.; Wu, J.; Yagi, A.; Baba, H.; Benzoni, G.; Chae, K. Y.; Crespi, F.C.L.; Fukuda, N.; Gernhäuser, R.; Inabe, N.; Isobe, T.; Jungclaus, Andrea CSIC ORCID; Kameda, D.; Kim, G. D.; Kim, Y. K.; Kojouharov, I.; Kondev, F.G.; Kubo, T.; Kurz, N.; Kwon, Y. K.; Lane, G.J.; Li, Z.; Moon, C.B.; Montaner-Pizá, A. CSIC; Moschner, K.; Naqvi, F.; Niikura, M.; Nishibata, H.; Nishimura, D.; Odahara, A.; Orlandi, R. CSIC ORCID; Patel, Z.; Podolyák, Zs.; Sakurai, H.; Schaffner, H.; Simpson, G. S.; Steiger, K.; Suzuki, H.; Takeda, H.; Wendt, A.; Yoshinaga, K. | Palabras clave: | 127 Ag Gamow-Teller β decay Isomer Radioactive isotope beam Shell evolution |
Fecha de publicación: | 10-dic-2021 | Editor: | Elsevier | Citación: | Physics Letters - Section B 823: 136766 (2021) | Resumen: | The change of the shell structure in atomic nuclei, so-called “nuclear shell evolution”, occurs due to changes of major configurations through particle-hole excitations inside one nucleus, as well as due to variation of the number of constituent protons or neutrons. We have investigated how the shell evolution affects Gamow-Teller (GT) transitions that dominate the β decay in the region below 132Sn using the newly obtained experimental data on a long-lived isomer in 127Ag. The T1/2=67.5(9) ms isomer has been identified with a spin and parity of (27/2+) at an excitation energy of 1942−20+14 keV, and found to decay via an internal transition of an E3 character, which competes with the dominant β-decay branches towards the high-spin states in 127Cd. The underlying mechanism of a strong GT transition from the 127Ag isomer is discussed in terms of configuration-dependent optimization of the effective single-particle energies in the framework of a shell-model approach. | Descripción: | 6 pags., 4 figs., 2 tabs. | Versión del editor: | https://doi.org/10.1016/j.physletb.2021.136766 | URI: | http://hdl.handle.net/10261/262168 | DOI: | 10.1016/j.physletb.2021.136766 | ISSN: | 0370-2693 |
Aparece en las colecciones: | (CFMAC-IEM) Artículos (IFIC) Artículos |
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