Yrast 6(+) Seniority Isomers of Sn-136,Sn-138
- Title
- Yrast 6(+) Seniority Isomers of Sn-136,Sn-138
- Author
- 김용균
- Keywords
- SHELL-MODEL CALCULATIONS; FISSION; NUCLEI; RIKEN; IDENTIFICATION; SEPARATOR; BIGRIPS; REGION; SN-132
- Issue Date
- 2014-09
- Publisher
- AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
- Citation
- PHYSICAL REVIEW LETTERS, SEP 26 2014, 113(13), 6p.
- Abstract
- 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.
- URI
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.132502http://hdl.handle.net/20.500.11754/48342
- ISSN
- 0031-9007; 1079-7114
- DOI
- 10.1103/PhysRevLett.113.132502
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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