1. MULTI-QUASIPARTICLE ISOMERS INVOLVING PROTON-PARTICLE AND NEUTRON-HOLE CONFIGURATIONS IN 131I AND 133I.
- Author
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WATANABE, H., OGAWA, K., LANE, G. J., DRACOULIS, G. D., BYRNE, A. P., NIEMINEN, P., KONDEV, F. G., CARPENTER, M. P., JANSSENS, R. V. F., LAURITSEN, T., SEWERYNIAK, D., ZHU, S., and CHOWDHURY, P.
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PARTICLES (Nuclear physics) , *QUASIPARTICLES , *NUCLEAR isomers , *ANGULAR correlations (Nuclear physics) , *NUCLEAR physics - Abstract
The nuclei 131I and 133I have been populated in multi-nucleon transfer reactions between 136Xe ions and various targets, and their structure investigated by time-correlated γ-ray coincidence spectroscopy and the measurement of γ-ray angular correlations. A 19/2- isomer at 1918 keV, with a half-life of 24(1) µs, has been identified in 131I, as well as nanosecond isomers with Jπ = 23/2+ in both isotopes. A T1/2 = 25(3) ns isomer at 4308 keV in 131I is suggested to have Jπ = (31/2-, 33/2-) and is primarily attributed to the coupling of an odd proton in the d5/2 or g7/2 orbit with the $(\pi^2)_{0^+} (\nu h_{11/2}^{-3} d_{3/2}^{-1})_{15^-}$ configuration in 130Te, responsible for the 15- isomer in that nucleus. The observed level properties are compared with predictions of a shell-model calculation. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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