Heavy odd-massSb127−133isotopes

The heavy odd-mass ${}_{}{}^{129-133}{}_{}{}^{}\mathrm{Sb}$ isotopes have been studied. Partial level schemes are constructed and $\mu \mathrm{s}$ isomeric states are observed and located as follows: $3 \mu \mathrm{s} \left({}_{}{}^{129}{}_{}{}^{}\mathrm{Sb}\right)$, $50 \mu \mathrm{s} \left({}_{}{}^{131}{}_{}{}^{}\mathrm{Sb}\right)$, and $17 \mu \mathrm{s} \left({}_{}{}^{133}{}_{}{}^{}\mathrm{Sb}\right)$. By means of particle-core coupling as well as one-proton two-neutron-hole (1p-2h) shell-model calculations, many of the observed properties such as energy spectra, branching ratios, and isomeric states can be reproduced qualitatively and even quantitatively.