Abstract
-ray singles and coincidence measurements following the decay of 2.41-min have been performed with Ge(Li) and NaI(Tl) detectors. A total of 13 rays have been assigned to decay and their energies and intensities have been measured accurately. From the coincidence measurements and energy-sum relationships 12 rays have been fitted into six excited states of with the following energies in keV and spins: 433.96, ; 931.09, ; 1052.82, ; 1314.22, ; 1441.16, ; and 1539.97, 1, 2. The first excited state of at 632.98 keV is also populated by the decay of . The spins of the 1052.82- and 1314.22-keV levels were determined uniquely as 0 from the NaI(Tl)-Ge(Li) directional-correlation measurements. These data also yield a spin of 2 for the 1441.16-keV level and multipolarity for the 1007.22-keV transition. A discussion of the levels within the vibrational framework is presented.
- Received 24 August 1972
DOI:https://doi.org/10.1103/PhysRevC.7.774
©1973 American Physical Society