Signature Inversion Of Yrast Band In Odd-Odd Lu-162 Nucleus

High spin states of the odd-odd Lu-162 nucleus have been studied via Sm-147(F-19.4n gamma) reaction at 95 MeV beam energy Level scheme for yrast band based on pi[h(11/2)]nu[i(13/2)] quasiparticle configuration was established up to I-pi = (23(-)) for the first time. This band shows the signature inversion in energy before backbending generally appeared in this mass region. It is stressed that the signature splitting in Lu-162 is larger than that in Tm-160 nucleus.