Study of 99Mo and 111Ag decays

The intensities of K x- and γ-rays emitted following the decays of ⁹⁹Mo and ¹¹¹Ag have been measured with better precision using four well calibrated semiconductor detectors. These intensity results have been further used to deduce the photon emission probabilities of various γ-transitions deexciting these radionuclides. The 158.9 and 162.5 keV γ-rays have been identified and placed through coincidence evidence to be in the level scheme of ⁹⁹Tc while 11 γ-rays, proposed in the earlier investigations of ⁹⁹Mo decay, have been discarded. This rules out the possibility of the existence of levels at 163, 727, 762 and 1082 keV. The intensities for K x-rays emitted following the decay of ¹¹¹Ag are reported for the first time.