States in ${}_{}{}^{145}{}_{}{}^{}\mathrm{Pm}$ were studied in the reaction ${}_{}{}^{130}{}_{}{}^{}\mathrm{Te}$${(}^{19}$F,4n) at a beam energy of 75 MeV using techniques of in-beam γ-ray and conversion electron spectroscopy. Measurements were made of γ-γ coincidences, γ-ray angular distributions, conversion electrons, and excitation functions between 70 and 85 MeV. The reduced B(E3) transition strength for the 795 keV (11/$2^{\mathrm{-}}$→5/$2_{\mathrm{g}.\mathrm{s}.\mathrm{}}^{+}$) transition was determined to be 7.8(18) Weisskopf units, supporting the interpretation of the 11/$2^{\mathrm{-}}$ state as a ${\mathit{h}}_{11/2}$ proton state. A negative-parity sequence built on the 11/$2^{\mathrm{-}}$ state as well as eleven new states above the 1503 keV 15/$2^{+}$ state were found. A weak coupling model can explain the structure of the deduced decay scheme up to an energy of 2.5 MeV.

• Received 20 December 1991

DOI:https://doi.org/10.1103/PhysRevC.45.1619