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- Title
Identification of $\mathrm{\ensuremath J^{\pi} = 19/2^+}$ and $\mathrm{\ensuremath 23/2^+}$ isomeric states in <sup>127</sup>Sb.
- Authors
Watanabe, H.; Lane, G.; Dracoulis, G.; Byrne, A.; Nieminen, P.; Kondev, F.; Ogawa, K.; Carpenter, M.; Janssens, R.; Lauritsen, T.; Seweryniak, D.; Zhu, S.; Chowdhury, P.
- Abstract
The nucleus $\ensuremath {\rm ^{127}Sb}$ , which is on the neutron-rich periphery of the $\ensuremath \beta$ -stability region, has been populated in complex nuclear reactions involving deep-inelastic and fusion-fission processes with $\ensuremath {\rm {}^{136}Xe}$ beams incident on thick targets. The previously known isomer at 2325 keV in $\ensuremath {\rm {}^{127}Sb}$ has been assigned spin and parity $\ensuremath 23/2^+$ , based on the measured $\ensuremath \gamma$ - $\ensuremath \gamma$ angular correlations and total internal conversion coefficients. The half-life has been determined to be 234(12) ns, somewhat longer than the value reported previously. The 2194 keV state has been assigned $\ensuremath J^{\pi} = 19/2^+$ and identified as an isomer with $\ensuremath T_{1/2} = 14(1) {\rm ns}$ , decaying by two $\ensuremath E2$ branches. The observed level energies and transition strengths are compared with the predictions of a shell model calculation. Two $\ensuremath 15/2^+$ states have been identified close in energy, and their properties are discussed in terms of mixing between vibrational and three-quasiparticle configurations.
- Subjects
NUCLEAR reactions; NUCLEAR fission; NUCLEAR fusion; NUCLEAR isomers; ANGULAR correlations (Nuclear physics)
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2009, Vol 42, Issue 2, p163
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/i2009-10881-7