Isomeric ratio of the 181Ta(γ, 3n)178m,gTa reaction products at energy E γmax up to 95 MeV

Abstract

Abstract The photoneutron reaction was investigated with the beam from the NSC KIPT electron linear accelerator LUE-40. The measurements were performed using the residual γ-activity method. The bremsstrahlung flux-averaged cross-sections , , and the isomeric ratio of the reaction products were measured. The theoretical values of the averaged cross-sections and isomeric ratio were calculated using the partial cross-sections from the TALYS1.95 code for different level density models 1-6. The obtained experimental agree with the data in the literature, but differ from the theoretical values in absolute magnitude and the behavior of the energy dependence. A comparison of the determined averaged cross-sections with the calculated cross-sections showed the best agreement for the case of the 5 model.