Investigation of Neutron-Proton Hole States in ${\mathrm{Tl}}^{206}$ by the Reaction ${\mathrm{Pb}}^{208}(d, \alpha ){\mathrm{Tl}}^{206}$

The neutron-hole, proton-hole states of ${\mathrm{Tl}}^{206}$ have been studied by the direct reaction ${\mathrm{Pb}}^{208}(d, \alpha ){\mathrm{Tl}}^{206}$ with 17-MeV deuterons. The experimental resolution of 15 keV or better permitted the detection of many two-hole states, most of them previously unknown. For most levels $L$ values could be extracted from the comparison of microscopic distorted-wave Born approximation (DWBA) calculations with experimental angular distributions. The experimental level energies and $J^{\pi }$ assignments (or limits) are compared with recent calculations by Kuo and are found to be in good agreement.