Absolute cross sections and isomeric cross-section ratios for the ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}\mathrm{}(d,2n)\mathrm{}$, ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}\mathrm{}(p,n)\mathrm{}$, and ${}_{}{}^{146}{}_{}{}^{}\mathrm{Nd}(\alpha ,pn)$ reactions producing the isomeric pair ${}_{}{}^{148}{}_{}{}^{}\mathrm{Pm}_{}^{m,g}{}_{}{}^{}$

Excitation functions and isomeric cross-section ratios were determined for the ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}\mathrm{}(d,2n)\mathrm{}$, ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}\mathrm{}(p,n)\mathrm{}$, and ${}_{}{}^{146}{}_{}{}^{}\mathrm{Nd}(\alpha ,pn)$ reactions producing the isomeric pair ${}_{}{}^{148}{}_{}{}^{}\mathrm{Pm}_{}^{m,g}{}_{}{}^{}$. The experimental isomer ratios of 41.3-day ${}_{}{}^{148}{}_{}{}^{}\mathrm{Pm}_{}^m{}_{}{}^{}$ (6-) and 5.37-day ${}_{}{}^{148}{}_{}{}^{}\mathrm{Pm}_{}^g{}_{}{}^{}$ (1-) were compared with statistical model calculations wherein spin cutoff parameters $\mu$ were obtained assuming that $\sigma$ is either independent or varying with excitation energy. The spin cutoff parameters and the effective moments of inertia deduced from these calculations were $\sigma =4.2\mathrm{}$ and $\theta =0.70\mathrm{}{\theta }_r$, respectively, for the reaction ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}\mathrm{}(p,n)\mathrm{} {}_{}{}^{148}{}_{}{}^{}\mathrm{Pm}_{}^{m,g}{}_{}{}^{}$, and $\sigma =3.9\mathrm{}$ and $\theta =0.65\mathrm{}{\theta }_r$, respectively, for the reaction ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}\mathrm{}(d,2n)\mathrm{} {}_{}{}^{148}{}_{}{}^{}\mathrm{Pm}_{}^{m,g}{}_{}{}^{}$.

[NUCLEAR REACTIONS ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}\mathrm{}(p,n)\mathrm{}$, ($d,2n$), ${}_{}{}^{146}{}_{}{}^{}\mathrm{Nd}(\alpha ,pn)$, $E_P=9-45\mathrm{}$ MeV, $E_d=6.5-52\mathrm{}$ MeV, $E_{\alpha }=29-59\mathrm{}$ MeV; measured $\sigma \mathrm{}\left(E\right)\mathrm{}$, isomer ratio; deduced spin cutoff parameter, moment of inertia.]