Signature Inversion of Yrast Band in Odd-Odd ^l62Lu Nucleus

High spin states of the odd-odd ^l62Lu nucleus have been studied via ¹⁴⁷Sm(¹⁹F,4nγ) reaction at 95MeV beam energy. Level scheme for yrast band based on π h_11/2v i_13/2 quasiparticle configuration was established up to I^π = (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 ¹⁶²Lu is larger than that in ¹⁶⁰Tm nucleus.