Abstract

High spin states in 180Ir have been studied via 154 Sm(31P,5nγ)180Ir reaction through excitation functions, X-γ and γ-γ-t coincidence measurements. Three rotational bands are identified including a doubly decoupled band, a semi-decoupled one, and a coupled structure up to (26+). The quasiparticle configurations associated with these bands are suggested according to in-band B(M1)/B(E2) ratios and band structures of neighboring odd-odd nuclei. Signature inversion in the semidecoupled band is discussed relying on systematics.

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