Eur. Phys. J. A (2025) 61: 199
https://doi.org/10.1140/epja/s10050-025-01666-7

Regular Article – Experimental Physics

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

¹ Institute of Physics, Slovak Academy of Sciences, 84511, Bratislava, Slovakia
² NSC “Kharkiv Institute of Physics and Technology”, National Academy of Sciences of Ukraine, 1 Academichna Str., 61108, Kharkiv, Ukraine

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Received: 6 May 2025
Accepted: 13 August 2025
Published online: 4 September 2025

Abstract

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