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Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag
- Watanabe, H.;
- Yuan, C.X.;
- Lorusso, G.;
- Nishimura, S.;
- Xu, Z.Y.;
- ... Kim, Yong Kyun;
- 외 48명
WEB OF SCIENCE
7SCOPUS
7초록
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.
키워드
- 제목
- Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag
- 저자
- 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.; Vajta, Z.; 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, A.; Kameda, D.; Kim, G.D.; Kim, Yong Kyun; Kojouharov, I.; Kondev, F.G.; Kubo, T.; Kurz, N.; Kwon, Y.K.; Lane, G.J.; Li, Z.; Moon, C.-B.; Montaner-Pizá, A.; Moschner, K.; Naqvi, F.; Niikura, M.; Nishibata, H.; Nishimura, D.; Odahara, A.; Orlandi, R.; Patel, Z.; Podolyák, Z.; Sakurai, H.; Schaffner, H.; Simpson, G.S.; Steiger, K.; Suzuki, H.; Takeda, H.; Wendt, A.; Yoshinaga, K.
- 발행일
- 2021-12-10
- 유형
- Article
- 저널명
- PHYSICS LETTERS B
- 권
- 823
- 페이지
- 1 ~ 6