
doi: 10.1007/bf01395014
The half lives of the 5/2 5/2−[523] level at 25.7 keV in66161Dy and the 5/2 5/2+[642] level in68163Er, found in this work to lie at 69.2 keV, have been determined by the delayed coincidence method to be T1/2=27.8± 1.5 nsec, and T1/2=8.8± 0.5 nsec, respectively. The following hindrance factors relative to the single particle Weisskopf estimate (FW and the Nilsson estimate (FN were obtained:66161Dy 5/2 5/2−[523] → 5/2 5/2+[642]:FW=(6.6± 1.3) × 103, FN=0.48± 0.1068163Er 5/2 5/2+[642] → 5/2 5/2−[523]:FW=(2.4± 0.5)× 104, FN=1.8 ± 0.4
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