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Isomers in Pd-128 and Pd-126: Evidence for a Robust Shell Closure at the Neutron Magic Number 82 in Exotic Palladium Isotopes
- Watanabe, H.;
- Lorusso, G.;
- Nishimura, S.;
- Xu, Z. Y.;
- Sumikama, T.;
- ... Kim, Yong Kyun;
- 외 46명
WEB OF SCIENCE
85SCOPUS
85초록
The level structures of the very neutron-rich nuclei Pd-128 and Pd-126 have been investigated for the first time. In the r-process waiting-point nucleus Pd-128, a new isomer with a half-life of 5.8(8) mu s is proposed to have a spin and parity of 8(+) and is associated with a maximally aligned configuration arising from the g(9/2) proton subshell with seniority v = 2. For Pd-126, two new isomers have been identified with half-lives of 0.33(4) and 0.44(3) mu s. The yrast 2(+) energy is much higher in Pd-128 than in Pd-126, while the level sequence below the 8(+) isomer in Pd-128 is similar to that in the N = 82 isotone Cd-130. The electric quadrupole transition that depopulates the 8(+) isomer in Pd-128 is more hindered than the corresponding transition in Cd-130, as expected in the seniority scheme for a semimagic, spherical nucleus. These experimental findings indicate that the shell closure at the neutron number N = 82 is fairly robust in the neutron-rich Pd isotopes.
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- Isomers in Pd-128 and Pd-126: Evidence for a Robust Shell Closure at the Neutron Magic Number 82 in Exotic Palladium Isotopes
- 저자
- Watanabe, H.; Lorusso, G.; Nishimura, S.; Xu, Z. Y.; Sumikama, T.; Soederstroem, P. -A.; Doornenbal, P.; Browne, F.; Gey, G.; Jung, H. S.; Taprogge, J.; Vajta, Zs.; Wu, J.; Yagi, A.; Baba, H.; Benzoni, G.; Chae, K. Y.; Crespi, F. C. L.; Fukuda, N.; Gernhaeuser, 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-Piza, A.; Moschner, K.; Naqvi, F.; Niikura, M.; Nishibata, H.; Nishimura, D.; Odahara, A.; Orlandi, R.; Patel, Z.; Podolyak, Zs.; Sakurai, H.; Schaffner, H.; Simpson, G. S.; Steiger, K.; Suzuki, H.; Takeda, H.; Wendt, A.; Yoshinaga, K.
- 발행일
- 2013-10
- 유형
- Article
- 권
- 111
- 호
- 15
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- 1 ~ 5