Neutron hole states ofMo99

The ($p, d$) and ($d, t$) reactions on ${}_{}{}^{100}{}_{}{}^{}\mathrm{Mo}$ have been used at bombarding energies of ∼ 40 MeV to populate neutron hole states of ${}_{}{}^{99}{}_{}{}^{}\mathrm{Mo}$. Excitation energies and angular distributions were measured for levels up to 4.25 MeV in excitation. A distorted wave Born approximation analysis was used to make $l$ assignments and to obtain spectroscopic factors. Three distinct groups of weakly excited levels, one corresponding to $l=4\mathrm{}$ and two corresponding to $l=1\mathrm{}$, were observed lying above 2.15 MeV excitation. A hole-core-coupling model is used to predict the properties of ${}_{}{}^{99}{}_{}{}^{}\mathrm{Mo}$ and fair agreement with the experiment is obtained.