Signature Inversion of the Semi-decoupled Band in the Odd-OddNucleus ¹⁷⁰Ta

The high-spin states of the odd-odd nucleus ¹⁷⁰Ta have been studied by the ¹⁵⁰Gd (¹⁹F, 4n) ¹⁷⁰Ta reaction at the beam energy of 97 MeV. The α =1 sequence of the semi-decoupled band has been pushed to higher-spin states and the signature inversion point was observed at 19.5ħ. The results are compared with those of the neighboring odd-odd nuclei.