Abstract
Predictions are made for the spectra associated with the (πh 11/2)n configuration whenn=4, 5 and 6. Since 14664 Gd82 actsas if it is a closed shell, these states are expected to be low-lying in the nuclei 15068 Er82, 15169 Tm82 and 15270 Yb82. The residualh 11/2 interaction is taken from the experimental spectrum of 14866 Dy82 and it is shown that this conserves seniority to a high degree. Arguments are given as to why configuration mixing may be hard to detect from a study of the energy levels alone. TheM1 selection rule and the number dependence of theE2 transition rates within the identical nucleonh 11/2 configuration are discussed and it is pointed out that seniority isomers should be seen in these nuclei. This prediction provides a stringent test of the configuration assignment. Formulae are given and estimates are made for the energies of theπg 7/2 andπd 5/2-hole states.
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I would like to thank P.J. Daly, T.L. Khoo and R.K. Smither for helpful discussions.
This work was performed under the auspices of the U.S. Dept. of Energy.
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Lawson, R.D. (πh 11/2)n States expected in 15068 Er82, 15169 Tm82 and 15270 Yb82 . Z Physik A 303, 51–61 (1981). https://doi.org/10.1007/BF01420010
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DOI: https://doi.org/10.1007/BF01420010