High-Spin Multiquasiparticle Yrast Traps in ${}^{176}{Hf}$

We have identified several high-

K

four- and six-quasiparticle states between 2.5 and 5 MeV excitation in

{}^{176}{Hf}

, which are well described by the collective model with axial symmetry. Isomers with

K^{π} = 14^{-}, 19^{+}, and 22^{-}

form traps at or near the yrast line. The yrast structure changes from the ground band to a

K^{π} = 16^{+}

band at

I = 16

and again to a

K^{π} = 22^{-}

state at

I = 22

, providing the first demonstration that intrinsic excitations of a heavy deformed nucleus can become yrast.

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High-Spin Multiquasiparticle Yrast Traps inHf176