Decay ofNd152and the Isomers ofPm152

The radiations associated with the decay of 11.4-min ${}_{}{}^{152}{}_{}{}^{}\mathrm{Nd}$ and its 4.1-min ${}_{}{}^{152}{}_{}{}^{}\mathrm{Pm}$ daughter have been studied with Ge(Li), NaI(Tl), and anthracene detectors in both singles and coincidence configurations. A tentative decay scheme for ${}_{}{}^{152}{}_{}{}^{}\mathrm{Nd}$ involving allowed $\beta$ decay to the 4.1-min isomer of ${}_{}{}^{152}{}_{}{}^{}\mathrm{Pm}$ ($1^{+}$) ($logft=4.8\mathrm{}$) and to an excited $1^{+}$ level 294.6-keV higher ($logft=4.2\mathrm{}$) is presented. The 4.1-min level undergoes $\beta$ decay to 10 levels in ${}_{}{}^{152}{}_{}{}^{}\mathrm{Sm}$ which have been previously established in decay studies of ${}_{}{}^{152}{}_{}{}^{}\mathrm{Eu}$, and from Coulomb excitation and reaction studies. A new level in ${}_{}{}^{152}{}_{}{}^{}\mathrm{Sm}$ has been placed at ≅1081 keV. The total $\beta$-decay energy is nearly the same as the measured $\beta$ end-point energy, 3.6 ± 0.2 MeV.