Dependence of the populations of low-energy levels in108,110Agon the resonance spin and parity

Abstract

Measurements of prompt $\ensuremath{\gamma}$ rays, following neutron capture in ${}^{107}\mathrm{Ag}$ and ${}^{109}\mathrm{Ag}$ have been performed at the GELINA facility in the resonance energy region up to about 1 keV. From the intensities of low- and high-energy $\ensuremath{\gamma}$ rays the spins of 53 ${}^{107}\mathrm{Ag}$ and 78 ${}^{109}\mathrm{Ag}$ s- and p-wave resonances have been assigned. These spectroscopic quantities are important for the interpretation of data from parity violation experiments performed by the TRIPLE Collaboration. The intensities of low-energy transitions showed a dependence not only on the spin of the resonance but also on its parity. This effect allows the assignment of the parity of the resonances and may open new perspectives in the study of the $\ensuremath{\gamma}$ decay of the compound nucleus.