Isomerism inPr148and the low-lying levels ofNd148

The decay of ${}_{}{}^{148}{}_{}{}^{}\mathrm{Pr}$ to levels of ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}$ has been studied using sources produced by the ${}_{}{}^{235}{}_{}{}^{}\mathrm{U}$(n,f) reaction followed by on-line mass separation, and by the ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}$(n,p) reaction using an enriched ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}$ target. Strong evidence is presented to support the previously proposed existence of a 2.27±0.05 min low-spin ${(1\mathrm{}}^{\mathrm{-}}$) isomer and a 1.95±0.08 min high-spin ${(4\mathrm{}}^{\mathrm{-}}$) isomer in ${}_{}{}^{148}{}_{}{}^{}\mathrm{Pr}$. The presence of levels at ${301.7(2}^{+}$), ${752.3(4}^{+}$), ${916.9(0}^{+}$), ${999.3(3}^{\mathrm{-}}$), ${1023.0(1}^{\mathrm{-}}$), ${1171.0(2}^{+}$), ${1241.6(5}^{\mathrm{-}}$), ${1248.7(2}^{+}$), and ${1279.7(6}^{+}$) keV in ${}_{}{}^{148}{}_{}{}^{}\mathrm{Nd}$ is also supported.