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

Abstract

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

arXiv admin note: substantial text overlap with arXiv:2308.02243

References in corpus (6)

• Photoneutron reactions on ${}^{\text{93}}$Nb at $E_{\gamma \text{max}}$=33-93 MeV
• Cross-sections for the ${}^{27}\mathrm{Al}(\gamma ,\text{x}{)}^{24}\mathrm{Na}$ multiparticle reaction at $E_{\gamma \max }$ = 40 $÷$ 95 MeV
• Photonuclear reactions ${}^{nat}$Ni($\gamma$,xn)${}^{57}$Ni and ${}^{nat}$Ni($\gamma$,xn)${}^{56}$Ni in the energy range E${}_{\gamma max}$ = 35...94 MeV
• Cross-sections for the ${}^{27}\mathrm{al}(\gamma ,\text{x}{)}^{22}\mathrm{na}$ multichannel reaction with the 28.3 mev difference of the reaction thresholds
• Isomeric pair ${}^{95\mathrm{m},\mathrm{g}}\mathrm{Nb}$ in photonuclear reactions on ${}^{\mathrm{nat}}$Mo at end-point bremsstrahlung energy of 35-95 MeV
• Production of ${}^{180\mathrm{m}}$Hf in photoproton reaction ${}^{181}$Ta$(\gamma ,p)$ at energy $E_{\gamma \max }$ = 35-95 MeV