Cross-section of the ${}^{\mathrm{nat}}\mathrm{Ni}(\gamma ,\mathrm{p}x\mathrm{n}{)}^{58}\mathrm{Co}$ reaction at the bremsstrahlung end-point energy of 35-94 MeV

Abstract

The photoproduction of the ${}^{58}\mathrm{Co}$ nuclei on ${}^{\mathrm{nat}}\mathrm{Ni}$ was studied using the induced $\gamma$-activity method and off-line $\gamma$-ray spectrometric technique. The experiment was performed at the electron linear accelerator LUE-40 NSC KIPT, Ukraine. The total flux-averaged cross-section $⟨\sigma (E_{\gamma \max })⟩$ for the ${}^{\mathrm{nat}}\mathrm{Ni}(\gamma ,\mathrm{p}x\mathrm{n}{)}^{58}\mathrm{Co}$ reaction has been measured in the range of bremsstrahlung end-point energies $E_{\gamma \max }$ = 35-94 MeV. The obtained $⟨\sigma (E_{\gamma \max })⟩$ were compared with theoretical estimates. The theoretical values of $⟨\sigma (E_{\gamma \max }){⟩}_{\mathrm{th}}$ were calculated using the partial cross-sections $\sigma (E)$ from the TALYS1.96 code for different level density models and gamma strength functions.

10 pages, 5 figures, 2 tables