Abstract

The previous experimental data on \ensuremath{\beta}-delayed proton decays of ${}^{142}\mathrm{Ho}$ and ${}^{128}\mathrm{Pm}$ were compared with a statistical-model calculation. As a result, the spins of both ${}^{142}\mathrm{Ho}$ and ${}^{128}\mathrm{Pm}$ were assigned as 5, 6, or 7. Nuclear potential-energy surface calculations were performed using the Woods-Saxon-Strutinsky method. The calculated results support the assignments of ${7}^{\ensuremath{-}}$ to ${}^{142}\mathrm{Ho}$ and ${6}^{+}$ to ${}^{128}\mathrm{Pm}.$

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