g-factors for ^{172, 173, 174, 178}Hf K-isomers

Abstract

The $\text{g-}\text{factors for}\text{K}{}^{\mathrm{\pi }}\text{= 6}{}^{\mathrm{+}}\text{,8}{}^{\mathrm{-}}\text{and}\text{23}\text{2}{}^{\mathrm{-}}$ isomers, with half-lives in the range 5 ns to 163 ns, have been measured in ^{172, 173, 174, 178}Hf, using the method of perturbed angular distributions. The results imply significant two-quasineutron admixtures in the K^π = 6⁺ isomer in ¹⁷⁴Hf, while the other two-quasiparticle isomers have pure two-quasiproton configurations. The g-factor for the $\text{K}{}^{\mathrm{\pi }}\text{=}\text{23}\text{2}{}^{\mathrm{-}}$ isomer in ¹⁷³Hf is consistent with the recently suggested two-quasiproton plus one- quasineutron configuration.