Decay of Cs145 to levels of Ba145

An investigation of the - decay of 0.59 s Cs145 into levels of Ba145 was undertaken to search for evidence of intrinsic reflection asymmetry in light rare-earth nuclei. E, I, - coincidence, angular correlation coefficients, and internal conversion coefficients were measured. The level scheme for Ba145 up to 1.3 MeV has been constructed. The proposed spin and parity assignments are based upon the measured transition multipolarities and the ?(hy angular correlation coefficients. The levels at 112, 175, 277, and 416 keV may be members of a decoupled K=1/2- band with a decoupling parameter of -2 and a rotational parameter of 20 keV. The octupole deformed rotational structure which is observed in the light odd-A actinides is not readily identified in Ba145. © 1986 The American Physical Society