1. Properties of 187Ta Revealed through Isomeric Decay.
- Author
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Walker, P. M., Hirayama, Y., Lane, G. J., Watanabe, H., Dracoulis, G. D., Ahmed, M., Brunet, M., Hashimoto, T., Ishizawa, S., Kondev, F. G., Litvinov, Yu. A., Miyatake, H., Moon, J. Y., Mukai, M., Niwase, T., Park, J. H., Podolyák, Zs., Rosenbusch, M., Schury, P., and Wada, M.
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HEAVY elements , *ARGON , *ISOMERS , *SYMMETRY , *LASERS - Abstract
Mass-separated 187Ta114 in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed a T1/2 = 7.3 ± 0.9 s isomer at 1778 ± 1 keV, which decays through a rotational band with perturbations associated with the approach to a prolate-oblate shape transition. Model calculations show less influence from triaxiality compared to heavier elements in the same mass region. The isomer-decay reduced E2 hindrance factor fν = 27 ± 1 supports the interpretation that axial symmetry is approximately conserved. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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