Decay ofTb162to Levels inDy162

The ${\mathrm{Tb}}^{162}$ beta decay to levels in ${\mathrm{Dy}}^{162}$ has been studied by means of scintillation spectrometers and a Ge(Li) detector. The sources of the ${\mathrm{Tb}}^{162}$ activity have been obtained from the ${\mathrm{Dy}}^{162}\mathrm{}(n,p)\mathrm{}{\mathrm{Tb}}^{162}$ reaction. The half-life of the ${\mathrm{Tb}}^{162}$ activity has been measured as 7.75±0.31 min. Gamma-ray transitions (with intensities in percent of total Tb decays) observed are: 81.0±0.8 (65%), a complex 184.5±0.4 (19%), 259.2±0.6 (72%), 805.2±1.2 (45%), 881.5±3.5 (15%), and 887.5±1.5 keV (35%). Gamma-ray transitions of 620±30, 690±25, and 1070±30 keV are tentatively indicated. A ${\mathrm{Dy}}^{162}$-level scheme is proposed with levels at 887.5 ($2^{+}$, $K=2\mathrm{}$), 962.2 ($3^{+}$, $K=2\mathrm{}$, and 1147 keV ($2^{-}$ or $3^{-}$, $K\ge 2$). Alternative placement of several transitions is discussed. Measurements of the beta spectrum yield a strong 1375±50-keV branch ($log ft=5.1\mathrm{}\pm 0.2$) to the 1147-keV level, a tentative branch (<10%, $log \mathrm{ft}>\mathrm{}6.4\mathrm{}$ to the 887.5-keV level, and no indication of a branch to the levels in the ground-state rotational band.