Pt192(α,α′)reaction atE=24MeV

Angular distributions for excitation of the $0^{+}$, $2^{+}$, $2^{+\text{'}}$, $4^{+}$, $4^{+\text{'}}$, and $3^{-}$ states in ${}_{}{}^{192}{}_{}{}^{}\mathrm{Pt}$ by 24 MeV $\alpha$ particles have been measured. Coupled-channels analysis of the ground-state band yields negative ${\beta }_4$ deformations. Analysis of the "$\gamma$ band" yields a negative $E2\mathrm{}$ interference term $P_3$ and a surprising large direct $E4\mathrm{}$ excitation of the $4^{+\text{'}}$ state.