Study ofZr92Levels Excited in the (d, p) Reaction

Seven energy levels in ${\mathrm{Zr}}^{92}$ were excited by the ($d, p$) reaction using 10.85-Mev deuterons. These levels were at excitation energies of 0, 0.94, 1.49, 1.86, 2.06, 2.91, and 3.28 Mev. The last two levels appear to be complex. Angular distributions were measured for all of these levels except the one at 1.86-Mev excitation. The distributions for the three lowest levels were $d$ wave; the distributions for the three highest levels were $s$ wave. Cross-section comparisons were made with earlier work on ${\mathrm{Zr}}^{91}$ levels. These comparisons indicated that the dominant configuration of the lowest levels is ${\left(d_{\frac{5}{2}}\right)}^2$ and that the 2.91-Mev level is largely ($d_{\frac{5}{2}}{s}_{\frac{1}{2}}$). A calculation of the neutron-neutron interaction, using vacuum-like, singlet forces between the nucleons, gives fair agreement with the experimental results.