Evaluation of light-element reactions in the resolved resonance region

¹ Division of Physical and Chemical Sciences, International Atomic Energy Agency, Wagramerstrasse 5, Vienna A-1400, Austria
² Tsinghua University, Beijing, PR China
³ Department of Physics and Astronomy and the Joint Institution of Nuclear Astrophysics, University Notre Dame, Notre Dame, IN 46556, USA
⁴ Department of Physics, University Notre Dame, Notre Dame, IN 46556, USA
⁵ Los Alamos National Laboratory, Theoretical Division, Los Alamos, NM 87545, USA
⁶ Japan Atomic Energy Agency, Tokai 319-1195, Japan
⁷ Atominstitut, Technische Universität Wien, Stadionallee 2, A-1020 Vienna, Austria
⁸ Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831, USA
⁹ CEA Cadarache, DES/IRESNE/DER/SPRC/LEPh, F-13108 Saint-Paul-lez-Durance, France
¹⁰ Lawrence Livermore National Laboratory, L-414, Livermore, CA 94551, USA

^* e-mail: P.Dimitriou@iaea.org

Published online: 26 May 2023

Abstract

Light-element reactions at low energies in the resolved resonance region are important for a range of applications in basic and applied sciences including nuclear reactors, nonproliferation, cultural heritage, forensics and environmental control, rare event investigations and nuclear astrophysics.

In this paper, we report on an effort to evaluate charged-particle cross sections in the resolved resonance region and produce evaluated nuclear data files for further processing and inclusion in evaluated data libraries. We discuss the open issues in R-matrix calculations as we extend to higher energies, such as dealing with the rapidly growing number of open channels and merging with the regime of smooth cross sections described by the statistical model, and present attempts to address these issues in neutron-induced reactions relevant to nuclear reactor applications.