Abstract
The decay of 7.76 min 162Tb has been studied with Ge(Li), NaI(Tl) and plastic detectors in singles and coincidence measurements. Sources were prepared using the 163Dy(γ, p) reaction. A total of 47 γ-ray transitions, 35 of them not reported before, have been observed and 40 transitions are incorporated in a level scheme comprising 17 excited states of 162Dy. A spin-parity assignment of 1 − is confirmed for the ground state of 162Tb. Levels at 1745.5 and 1782.6 keV are assigned as the 1 + and 2 + states of the 1 + {n[521]↑-n[523]↓} band, respectively. Gamma-ray branching ratios favor K = 0 for the 1 − state at 1275.8 keV and K = 1 for the 3 − state at 1357.8 keV. A value of z 2 = 0.0355 ± 0.0021 is deduced for transitions between the γ-band and the ground-state band in 162Dy.
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