Ta181(p,2nγ)W180reaction

States populated by the ${}_{}{}^{181}{}_{}{}^{}\mathrm{Ta}$($p$,$2n\gamma$) ${}_{}{}^{180}{}_{}{}^{}\mathrm{W}$ reaction were studied using in-beam $\gamma$-ray spectroscopy with standard techniques that included fast timing, coincidences, and angular distributions. We populate the previously well characterized bands built on the ground state and the 5.2-ms $8^{-}$ state at 1529.0 keV up to the ${12}^{+}$ and ${12}^{-}$ levels, respectively. In addition we identify the rotational band built on the 7.4-ns $K=2^{-}$ octupole vibrational state at 1006.4 keV up to the $J^{\pi }={11}^{-}$ member and we observe the decoupling of the octupole phonon from the core rotation. A state at 1634.6 keV is populated with moderate intensity. If this state is the one reported at 1637 keV in ($d$,$d$) excitation then it is most likely the $K=3^{-}$ octupole vibration. We observe the gamma-vibrational band up to the spin 7 member and also a new band built on a metastable state at 1639.8 keV. This state has a half life of 19.2±0.3 ns and most likely $J=5\mathrm{}$ with uncertain parity.