Measurement of the isomeric yield ratios of ${}^{196m,g}$Au and ${}^{195m,g}$Hg in the ${}^{197}$Au(p,x) reaction

In this study, the isomeric yield ratio (IR) values of ${}^{196m,g}$Au and ${}^{195m,g}$Hg in the ${}^{197}$Au(p,x) reaction within the proton energy range of 49.8-65.5 MeV were measured at the high-intensity proton linac facility (KOMAC) in Korea using an offline γ-ray spectrometric technique. Furthermore, the IR values of the above-mentioned products at different proton energies were calculated from the cross-sections based on the data in the TENDL-2019 library and are found to be higher than the experimental values. The IR values of ${}^{196m,g}$Au and ${}^{195m,g}$Hg in the ${}^{197}$Au(p,x) reaction from the present and other works are compared with the similar literature data in the ${}^{197}$Au(γ,n), ${}^{196}$Hg(γ,n), ${}^{197}$Au(n,2n), ${}^{196}$Hg(n,2n), ${}^{nat}$Pt(α,x) and ${}^{nat}$Pt(${}^3$He,x) reactions to examine the role of compound nucleus spin, excitation energy, and input angular momentum.