Abstract
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 \ensuremath{\gamma}-ray excitation functions, \ensuremath{\gamma}-\ensuremath{\gamma}-t coincidences, and \ensuremath{\gamma}-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 \ensuremath{\gamma} rays was established for the first time, including a ${15}^{+}$ isomer with a measured half-life of 8.0\ifmmode\pm\else\textpm\fi{}3.6 ns. The level structure of $^{198}\mathrm{Bi}$ was qualitatively interpreted by using semiempirical methods. \textcopyright{} 1996 The American Physical Society.
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