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Yrast 6(+) Seniority Isomers of Sn-136,Sn-138
- Simpson, G. S.;
- Gey, G.;
- Jungclaus, A.;
- Taprogge, J.;
- Nishimura, S.;
- ... Kim, Yong Kyun;
- 외 45명
WEB OF SCIENCE
74SCOPUS
76초록
Delayed gamma-ray cascades, originating from the decay of (6(+)) isomeric states, in the very neutron-rich, semimagic isotopes Sn-136,Sn-138 have been observed following the projectile fission of a U-238 beam at RIBF, RIKEN. The wave functions of these isomeric states are proposed to be predominantly a fully aligned pair of f(7/2) neutrons. Shell-model calculations, performed using a realistic effective interaction, reproduce well the energies of the excited states of these nuclei and the measured transition rates, with the exception of the B(E2; 6(+) -> 4(+)) rate of Sn-136, which deviates from a simple seniority scheme. Empirically reducing the nu f(7/2)(2) orbit matrix elements produces a 4(1)(+) state with almost equal seniority 2 and 4 components, correctly reproducing the experimental B(E2; 6(+) -> 4(+)) rate of Sn-136. These data provide a key benchmark for shell-model interactions far from stability.
키워드
- 제목
- Yrast 6(+) Seniority Isomers of Sn-136,Sn-138
- 저자
- Simpson, G. S.; Gey, G.; Jungclaus, A.; Taprogge, J.; Nishimura, S.; Sieja, K.; Doornenbal, P.; Lorusso, G.; Soederstroem, P. -A.; Sumikama, T.; Xu, Z. Y.; Baba, H.; Browne, F.; Fukuda, N.; Inabe, N.; Isobe, T.; Jung, H. S.; Kameda, D.; Kim, G. D.; Kim, Yong Kyun; Kojouharov, I.; Kubo, T.; Kurz, N.; Kwon, Y. K.; Li, Z.; Sakurai, H.; Schaffner, H.; Shimizu, Y.; Suzuki, H.; Takeda, H.; Vajta, Z.; Watanabe, H.; Wu, J.; Yagi, A.; Yoshinaga, K.; Boenig, S.; Daugas, J. -M.; Drouet, F.; Gernhaeuser, R.; Ilieva, S.; Kroell, T.; Montaner-Piza, A.; Moschner, K.; Muecher, D.; Naidja, H.; Nishibata, H.; Nowacki, F.; Odahara, A.; Orlandi, R.; Steiger, K.; Wendt, A.
- 발행일
- 2014-09
- 유형
- Article
- 권
- 113
- 호
- 13
- 페이지
- 1 ~ 6