Experimental Study of the (d,t) Reaction on Even-Mass Mo Isotopes

The ($d,t$) reaction on ${\mathrm{Mo}}^{92,94,96,98}$ was studied with the 23-MeV deuteron beam from the Argonne cyclotron. The experimental angular distributions of triton groups were compared with the distorted-wave Born approximation (DWBA) theory, and the $l$ values and the spectroscopic factors were determined. The level structure of the ${\mathrm{Mo}}^{91}$ nucleus is very similar to that of ${\mathrm{Zr}}^{89}$. Evidence for core excitation in ${\mathrm{Mo}}^{92}$ was found. The results for the other isotopes show that neutron orbits higher than the $2d_{\frac{5}{2}}$ shell are admixed in the ground-state configuration of these nuclei. These results are compared with previous data and with shell-model calculations.