Level Structure ofPd106

The decay of 8.1-day ${\mathrm{Ag}}^{106}$ produced in the ${\mathrm{Rh}}^{109}(\alpha ,n){\mathrm{Ag}}^{106}$ and ${\mathrm{Ag}}^{107}\mathrm{}(n,2n)\mathrm{}{\mathrm{Ag}}^{106}$ reactions has been studied with lithium-drifted Ge detectors and standard scintillation spectrometers. The level structure of ${\mathrm{Pd}}^{106}$ has been found to be much more complex than previously reported. Twenty-five-ray transitions from 0.200-2.08 MeV have been observed to decay with half-life of 8.1 days. The transitions with intensities greater than 1% of the 0.512-MeV transition decays have the following energies and transition intensities: 0.221 (9), 0.278 (11), 0.345 (12), 0.400 (4), 0.410 (10), 0.430 (8) 0.450 (19), 0.512 (100), 0.616 (25), 0.650 (10), 0.720 (37), 0.750 (25), 0.800 (5), 0.810 (20), 0.830 (26), 1.04 (24), 1.08 (1.5), 1.12 (10), 1.2 (8), 1.22 (5), 1.52 (7), 1.57 (4), $1.66 \left(\approx 1\right)$, $1.72 \left(\approx 1\right)$, and $1.83 \left(\approx 1\right)$. Gamma-gamma coincidence studies with the help of Ge detectors have confirmed new levels at energies of 1.34, 3.25, and 3.31 MeV in ${\mathrm{Pd}}^{106}$. Sum-coincidence studies have been performed, and based on these results the level structure of ${\mathrm{Pd}}^{106}$ is given and discussed in the light of the vibrational model. The half-life of the 2.94-MeV level has been measured by delayed-coincidence technique as (2±0.5)×${10}^{-7\mathrm{}}$ sec.