Cross-sections of photonuclear reactions on ${}^{nat}$Mo targets at end-point bremsstrahlung energy up to $E_{\gamma max}$ = 100 MeV

Abstract

Experiments to determine the yields and bremsstrahlung flux-averaged cross-sections <$\sigma (E_{\gamma max})$> of photonuclear reactions on the natural Mo targets were performed on the beam from the NSC KIPT electron linear accelerator LUE-40 with the use of the $\gamma$-activation technique. The bremsstrahlung end-point energies were in the range $E_{\gamma max}$ = 35...80 MeV. The bremsstrahlung quantum flux was calculated with the program GEANT4.9.2 and, in addition, was monitored using the ${}^{100}$Mo$(\gamma ,n{)}^{99}$Mo reaction. Calculations of the yields and average cross-sections <$\sigma (E_{\gamma max})$> for photonuclear reactions on stable Mo isotopes were computed using the $\sigma (E)$ cross-sections from the TALYS1.95 code (for the level density model LD1). A comparison of experimental and calculated cross-sections <$\sigma (E_{\gamma max})$> for reactions ${}^{92}$Mo$(\gamma ,2n{)}^{90}$Mo and ${}^{92}$Mo$(\gamma ,pn{)}^{90}$Nb was performed.

6 pages, 8 figures, 2 tables