Study ofEr166by means of the (He3,d) and (α,t) reactions

Two-proton quasiparticle states in ${}_{}{}^{166}{}_{}{}^{}\mathrm{Er}$ have been studied with (${}_{}{}^3{}_{}{}^{}\mathrm{He},d$) and ($\alpha ,t$) reactions on ${}_{}{}^{165}{}_{}{}^{}\mathrm{Ho}$. Rotational bands built upon quasiparticle states formed by the [$523\uparrow$] proton state coupled with the [$411\downarrow$], [$404\downarrow$], and [$541\downarrow$] proton states were identified. For each rotational band, the cross sections have a characteristic pattern which has been used to identify the band. Assignments were checked by comparing the ratios of (${}_{}{}^3{}_{}{}^{}\mathrm{He},d$) and ($\alpha ,t$) cross sections for each level.