STUDY OF HIGH-SPIN STATES IN BI-198

The high-spin states of Bi-198 have been studied via the reaction Re-1 87(O-16, 5n)Bi-198 at O-16 energies from 85-105MeV, In-beam measuremen ts of gamma-ray excitation functions, gamma-gamma-t coincidences, and gamma-ray angular distributions were carried out with 6 BGO(AC)HPGe de tectors and 1 intrinsic Ge planar detector, A level scheme for Bi-198 with 26 gamma-rays was established for the first time, including a 15( +) isomer with a measured half-life of 8.0 +/- 3.6ns. Based on the kno wn level structure systematics in Bi200-206, the level structure of Bi -198 was qualitatively interpreted by using semi-empirical methods.