Experimental validation of .sup.23./sup.Na(γ, n).sup.22./sup.Na cross section

0584295 - ÚJF 2025 RIV GB eng J - Journal Article
Zmeškal, M. - Košťál, M. - Šimon, J. - Chvátil, David - Krist, Pavel
Experimental validation of ²³Na(γ, n)²²Na cross section.
Applied Radiation and Isotopes. Roč. 205, MAR (2024), č. článku 111194. ISSN 0969-8043
Institutional support: RVO:61389005
Keywords : Cross section validation * Microtron * Bremsstrahlung * Geant4 * Sodium
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 1.6, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.apradiso.2024.111194

Photonuclear reactions are gaining importance due to their influence on the shielding and activation of components of widely spread accelerators. Therefore, there is a need for accurate data describing photonuclear reactions. The MT25 microtron operated at NPI was used for validation of cross section in the bremsstrahlung. The gold and copper activation foils with known cross sections were used as flux monitors. The bremsstrahlung spectra was simulated with Geant4 code and the spectral averaged cross section above 10 MeV for reaction Na-23(gamma, x)Na-22 was calculated. The experimental result was compared with data from the evaluated data libraries and EXFOR database. It was proved that the facility can be used for validation of cross sections and it was showed that all libraries overestimate the photon cross section on Na-23 with the best results with data from JENDL-5 library.
Permanent Link: https://hdl.handle.net/11104/0352227