Abstract

High-spin states in $^{177}\mathrm{Ta}$ were produced using the $^{170}\mathrm{Er}$${(}^{11}$B, 4n) reaction at 55 and 60 MeV. Considerable extensions have been made to the previously known level scheme, and new structures have been found. B(M1)/B(E2) ratios have been extracted for strongly coupled bands. The behavior of the different rotational cascades, in particular the anomalous crossing frequency observed in the [541]1/${2}^{\mathrm{\ensuremath{-}}}$ proton ${\mathit{h}}_{9/2}$ band and the occurrence of ``identical bands,'' is discussed. Comparisons are made with projected shell model calculations.

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