Measurement of bremsstrahlung-induced reaction cross-section for ⁹³Nb using electron Linac

Abstract

Summary Cross sections for (γ, n) reaction at bremsstrahlung end point energies of 10 and 12.5MeV on niobium have been measured by the activation technique. Induced activities were measured by a high-resolution γ-ray spectrometer with a high-purity germanium (HPGe) detector. Theoretically the (γ, n) cross-section of 93Nb as a function of photon energies were also calculated using TALYS 1.4 computer code. We compared the measured data with the flux weighted average values from the available literature data based on experiments with mono-energetic photons and the theoretical calculation by the model code TALYS 1.4. The experimental values are found to be in good agreement with the theoretical value from TALYS 1.4 but are slightly higher than the flux-weighted values from mono-energetic photons

Photoneutron reactions on 93Nb at Emax=33–93 MeV

“…[27] at E  max = 32 MeV turned out to be higher than the calculated values of <(E  max)>m and <(E  max)>tot, while at E  max = 10 and 12.5 MeV the data from Ref. [21] coincided with the calculation.…”

“…Sufficiently complete data on the cross-sections for the reactions (,n) and (,2n) on 93 Nb were obtained in the GDR region on a beam of quasi-monochromatic annihilation photons in the energy range 8  25 MeV using the direct neutron detection method [20]. In the same energy range, data are known on the bremsstrahlung flux-averaged cross-sections for the reaction 93 Nb(,n) 92m Nb at the boundary energies of bremsstrahlung -quanta E  max = 10 and 12.5 MeV [21] and at E  max = 12, 14, and 16 MeV [22] obtained using the induced activity method.…”

“…Measured average cross-sections for the 93 Nb(,n)92 Nb reaction compared with the previously published data together with theoretical calculations based on TALYS1.9 code. The experimental data are from Refs [20][21][22][23]27]…”

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

“…An experimental study of copper photodisintegration cross-sections has been conducted through measurements of the residual γ-activity of the irradiated sample, which enabled one to simultaneously obtain the data from different channels of photonuclear reactions. This well known technique has been described in a variety of papers concerned with the investigation of multiparticle photonuclear reactions, e.g., on the nuclei [22,23], [24][25][26][27][28] and [1,29].…”