Methodology for measuring photonuclear reaction cross sections with an electron accelerator based on Bayesian analysis.

Autor: Braccini S; Albert Einstein Center for Fundamental Physics (AEC), Laboratory for High Energy Physics (LHEP), University of Bern, 3012, Bern, Switzerland., Casolaro P; Albert Einstein Center for Fundamental Physics (AEC), Laboratory for High Energy Physics (LHEP), University of Bern, 3012, Bern, Switzerland; Department of Physics 'Ettore Pancini', University of Napoli Federico II, Complesso Universitario di Monte S. Angelo, 80126, Napoli, Italy; INFN Naples Unit, Naples, Italy. Electronic address: pierluigi.casolaro@unina.it., Dellepiane G; Albert Einstein Center for Fundamental Physics (AEC), Laboratory for High Energy Physics (LHEP), University of Bern, 3012, Bern, Switzerland., Kottler C; Federal Institute of Metrology METAS, 3003, Bern-Wabern, Switzerland., Lüthi M; Federal Institute of Metrology METAS, 3003, Bern-Wabern, Switzerland; Department of Chemistry, Biochemistry, and Pharmaceutical Sciences (DCBP), University of Bern, 3012, Bern, Switzerland. Electronic address: matthias.luethi@metas.ch., Mercolli L; Albert Einstein Center for Fundamental Physics (AEC), Laboratory for High Energy Physics (LHEP), University of Bern, 3012, Bern, Switzerland; Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, 3010, Bern, Switzerland., Peier P; Federal Institute of Metrology METAS, 3003, Bern-Wabern, Switzerland., Scampoli P; Albert Einstein Center for Fundamental Physics (AEC), Laboratory for High Energy Physics (LHEP), University of Bern, 3012, Bern, Switzerland; Department of Physics 'Ettore Pancini', University of Napoli Federico II, Complesso Universitario di Monte S. Angelo, 80126, Napoli, Italy., Türler A; Department of Chemistry, Biochemistry, and Pharmaceutical Sciences (DCBP), University of Bern, 3012, Bern, Switzerland.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2024 Jun; Vol. 208, pp. 111275. Date of Electronic Publication: 2024 Mar 02.
DOI: 10.1016/j.apradiso.2024.111275
Abstrakt: Accurate measurements of photonuclear reaction cross sections are crucial for a number of applications, including radiation shielding design, absorbed dose calculations, reactor physics and engineering, nuclear safeguard and inspection, astrophysics, and nuclear medicine. Primarily motivated by the study of the production of selected radionuclides with high-energy photon beams (mainly 225 Ac, 47 Sc, and 67 Cu), we have established a methodology for the measurement of photonuclear reaction cross sections with the microtron accelerator available at the Swiss Federal Institute of Metrology (METAS). The proposed methodology is based on the measurement of the produced activity with a High Purity Germanium (HPGe) spectrometer and on the knowledge of the photon fluence spectrum through Monte Carlo simulations. The data analysis is performed by applying a Bayesian fitting procedure to the experimental data and by assuming a functional trend of the cross section, in our case a Breit-Wigner function. We validated the entire methodology by measuring a well-established photonuclear cross section, namely the 197 Au(γ, n) 196 Au reaction. The results are consistent with those reported in the literature.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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