Cross-sections of photonuclear reactions ⁶⁵Cu(γ, n)⁶⁴Cu and ⁶³Cu(γ, xn)^63−xCu in the energy range E _γmax = 35–94 MeV

Abstract

The flux-averaged cross-sections 〈σ(E γmax)〉 for the reactions 65Cu(γ,n)64Cu, 63Cu(γ,n)62Cu, 63Cu(γ,2n)61Cu and 63Cu(γ,3n)60Cu have been measured within the bremsstrahlung end-point energies E γmax range of 35–94 MeV. The experiments were performed with the electron beam from the NSC KIPT linear accelerator LUE-40 with the use of the activation and off-line γ-ray spectrometric technique. Theoretical calculation of the flux-average cross-sections 〈σ(E γmax)〉th was carried out using the cross-section σ(E) values from the TALYS1.95 code with the default options. It is shown that the experimental average cross-sections for the reactions 65Cu(γ,n)64Cu, 63Cu(γ,n)62Cu, 63Cu(γ,2n)61Cu are systematically higher than the theoretical estimates based on the TALYS1.95 code. The obtained 〈σ(E γmax)〉 supplement the data of different laboratories for the (γ,n) and (γ,2n) reactions of 63Cu and 65Cu. For the reaction 63Cu(γ,3n)60Cu, the values of 〈σ(E γmax)〉 were measured for the first time.

PHOTONUCLEAR REACTIONS CROSS-SECTIONS AT ENERGIES UP TO 100 MeV FOR DIFFERENT EXPERIMENTAL SETUPS

“…To date, for example, to monitor the flux of quanta, the following reactions 197 Au(γ,n) 196 Au [20], 65 Cu(γ,n) 64 Cu [5,21], 100 Mo(γ,n) 99 Mo [22][23][24] are used. These reaсtions have reliable experimental cross-section data in the literature [25][26][27].…”