Levels in ${}_{}{}^{92}{}_{}{}^{}\mathrm{Zr}$ were studied by a high resolution ($d$,$p$) reaction on ${}_{}{}^{91}{}_{}{}^{}\mathrm{Zr}$. Outgoing particles were momentum analyzed in a split-pole spectrograph and detected in nuclear emulsion plates. A total of 64 levels was identified up to about 5.4 MeV of excitation, several of them not previously reported. Experimental angular distributions were compared to distorted-wave Born-approximation predictions and reduced spectroscopic factors obtained. Energies of centers of gravity of each shell-model orbital were deduced and effective ${\left(d_{\frac{5}{2}}\right)}^2$ and ($s_{\frac{1}{2}}{d}_{\frac{5}{2}}$) neutron-neutron two-body diagonal matrix elements were estimated.

NUCLEAR REACTIONS ${}_{}{}^{91}{}_{}{}^{}\mathrm{Zr}$($d$,$p$), $E=12\mathrm{}$ MeV; measured $\sigma (E_p,\theta )$. ${}_{}{}^{92}{}_{}{}^{}\mathrm{Zr}$ deduced levels $l$, $J$, $\pi$, reduced spectroscopic factors. Enriched targets.

• Received 13 June 1979

DOI:https://doi.org/10.1103/PhysRevC.20.2101