The high-spin states of ${}_{}{}^{198}{}_{}{}^{}\mathrm{Bi}$ have been studied via the reaction ${}_{}{}^{187}{}_{}{}^{}\mathrm{Re}$${(}^{16}$O,5n${)}^{198}$Bi at ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ energies from 85 to 105 MeV. In-beam measurements of γ-ray excitation functions, γ-γ-t coincidences, and γ-ray angular distributions were carried out with 6 BGO(AC)HPGe detectors and one intrinsic Ge planar detector. A level scheme for ${}_{}{}^{198}{}_{}{}^{}\mathrm{Bi}$ with 26 γ rays was established for the first time, including a ${15}^{+}$ isomer with a measured half-life of 8.0±3.6 ns. The level structure of ${}_{}{}^{198}{}_{}{}^{}\mathrm{Bi}$ was qualitatively interpreted by using semiempirical methods. © 1996 The American Physical Society.

• Received 13 February 1996

DOI:https://doi.org/10.1103/PhysRevC.54.2948