Cross-section of the $$^{95}$$Nb production on natural molybdenum at the bremsstrahlung end-point energy up to 95 MeV

Abstract

AbstractThe photoproduction of $$^{95\mathrm m}$$ 95 m Nb on $${^\textrm{nat}\textrm{Mo}}$$ nat Mo was studied using the electron beam of the LUE-40 linac RDC ”Accelerator” NSC KIPT. Measurements were performed using activation and off-line $$\gamma $$ γ -ray spectrometric techniques. The experimental flux-averaged cross-section $$\langle {\sigma (E_\mathrm{{\gamma max}})}\rangle _\mathrm{{m}}$$ ⟨ σ ( E γ max ) ⟩ m for the $${^{\textrm{nat}}\textrm{Mo}}(\gamma ,x\mathrm np)^{95\mathrm m}$$ nat Mo ( γ , x n p ) 95 m Nb reaction at the bremsstrahlung end-point energy range of 38–93 MeV has been first time obtained. The estimated values $$\langle {\sigma (E_\mathrm{{\gamma max}})}\rangle _\mathrm{{g}}$$ ⟨ σ ( E γ max ) ⟩ g for the formation of $$^{95}$$ 95 Nb in the ground state and total cross-sections $$\langle {\sigma (E_\mathrm{{\gamma max}})}\rangle _\mathrm{{tot}}$$ ⟨ σ ( E γ max ) ⟩ tot for the studied reaction were determined. The theoretical values of the yields $$Y_\textrm{m,g,tot}(E_\mathrm{{\gamma max}})$$ Y m,g,tot ( E γ max ) and flux-averaged cross-sections $$\langle {\sigma (E_\mathrm{{\gamma max}})}\rangle _\mathrm{{m,g,tot}}$$ ⟨ σ ( E γ max ) ⟩ m , g , tot for the $${^{\textrm{nat}}\textrm{Mo}}(\gamma ,x\mathrm np)^{95\mathrm m,g,tot}$$ nat Mo ( γ , x n p ) 95 m , g , t o t Nb reactions were calculated using the cross-sections $$\sigma (E)$$ σ ( E ) from the TALYS1.95 code for six different level density models. The comparison showed a significant excess of the experimental results over the theoretical $$\langle {\sigma (E_\mathrm{{\gamma max}})}\rangle _\mathrm{{m,g,tot}}$$ ⟨ σ ( E γ max ) ⟩ m , g , tot values.