Average cross section measurement for 162Er(γ,n) reaction compared with theoretical calculations using TALYS

Abstract

Bremsstrahlung photon beam delivered by a linear electron accelerator has been used to experimentally determine the near threshold photonuclear cross section data of nuclides. For the first time, (γ,n) cross section data was obtained for the astrophysical important nucleus 162Er. Moreover, theoretical calculations have been applied using the TALYS 1.6 code. The effect of the gamma ray strength function on the cross section calculations has been studied. A satisfactorily reproduction of the available experimental data of photonuclear cross section at the energy region below 20 MeV could be achieved. The photon flux was monitored by measuring the photons yield from seven well known (γ, n) reactions from the threshold energy of each reaction up to the end-point energy of the photon beam used. An integrated cross-section 87 ± 14 mb is calculated for the photonuclear reaction 162Er(γ,n) at the energy 9.2 - 14 MeV. The effective cross section estimated using the TALYS code range between 89 and 96 mb depending on the γ-strength function used. The result for 162Er(γ,n), is found to be in good agreement with the theoretical values obtained by TALYS 1.6. So, the present indirect process could be a valuable tool to estimate the effective cross section of (γ,n) reaction for various isotopes using bremsstrahlung beams.

High-precision measurements of half‐lives for 69Ge, 73Se, 83Sr, 85mSr, and 63Zn radionuclides relevant to the astrophysical p-process via photoactivation at the Madison Accelerator Laboratory

“…However, using an "off-the-shelf" medical linear acclerator, originally designed for clinical operation and repurposing it for nuclear physics experiments, is a novel idea. We have successfully explored it in this work in light of a pioneering photoactivation study [8] and of more recent photoneutron average cross section measurements [9][10][11][12], all carried at clinical electron linacs, demonstrating that the excellent stability and reproducibility of the beam of this type are good pre-requisites for photonuclear experiments.…”

55Mn İzotopunun Fotonükleer Tesir Kesitleri Üzerinde Kollektif Nükleer Seviye Yoğunluğunun Etkisi

“…Ölçümlerde hızlı pozitron demetlerinin anhilasyonundan elde edilen monoenerjetik foton demetleri radyasyon kaynağı olarak kullanılmıştır. Daha sonra, 55 Mn iztopunun fotonükleer tesir kesitleri 162 Er izotopunun fotonükleer reaksiyon tesir kesiti ölçümlerinde kullanılmak üzere, gama ışınım şiddet fonksiyonları kullanılarak analiz edilmiştir [4].…”