Photonuclear reactions on a natural mixture of mercury isotopes were investigated by the activation method at an electron energy of E^m=55 MeV. The reaction yields as well as the isomeric ratios for ^195, 197 Hg and ^198, 200 Au were determined. The results are compared with theoretical predictions from the TALYS 2. 0 code. Based on both the present experimental and available literature data, the systematics of isomeric ratios as a function of spin factors were obtained for heavy nuclei in the Z=60-80 range.
Poriadina et al. (Mon,) studied this question.