States inN=81Nd141populated by the decay ofPm141

The decay of 20.90-min ${}_{}{}^{141}{}_{}{}^{}\mathrm{Pm}$ has been studied with Ge(Li) and NaI(Tl) $\gamma$-ray detectors in a variety of singles and coincidence configurations, including Ge(Li)-Ge(Li) two-parameter "megachannel" coincidence experiments, anticoincidence experiments, and pair (${\gamma }^{\pm }-\gamma$) experiments to determine the relative ${\beta }^{+}$ feedings. Fifty-two $\gamma$ rays were identified from this decay, and 43 of these (> 99% of the $\gamma$ intensity) were placed in a decay scheme containing 23 levels in ${}_{}{}^{141}{}_{}{}^{}\mathrm{Nd}$. $J^{\pi }$ assignments or limits were made for all of the states. The structures of the lower-lying states in ${}_{}{}^{141}{}_{}{}^{}\mathrm{Nd}$ are discussed in terms of the shell model, and possible structures are also suggested for many of the higher-lying states. We compare our results with those of previous studies and also with particle-transfer data.