Abstract
High spin states in ${}^{127}\mathrm{La}$ have been studied using the ${}^{32}\mathrm{S}{(}^{100}\mathrm{Mo},p4n)$ reaction at a beam energy of 155 MeV. Gamma rays were detected using the EUROBALL III spectrometer. One of the side bands in ${}^{127}\mathrm{La}$ is observed to be populated to a spin of ${\frac{83}{2}}^{+}.$ These data are compared with cranked Nilsson-Strutinski calculations which suggest that the structure is a smoothly terminating band, in valence space, based upon a $\ensuremath{\pi}[{(g}_{7/2}{d}_{5/2}{)}^{5}{(h}_{11/2}{)}^{2}]\ensuremath{\bigotimes}\ensuremath{\nu}[{(g}_{7/2}{d}_{5/2}{)}^{12}{(h}_{11/2}{)}^{6}{(d}_{3/2}{s}_{1/2}{)}^{2}]$ configuration, which can carry a maximum spin of $47.5\ensuremath{\Elzxh}.$ This is the first identification of such a structure in this mass region.
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