https://doi.org/10.1051/epjconf/202328100020
Covariances and parameter confidence intervals from light-element R-matrix evaluations
Theoretical Divsion, Los Alamos National Laboratory, MS B283, Los Alamos, New Mexico 87545
* e-mail: mparis@lanl.gov
** e-mail: ghale@lanl.gov
Published online: 29 March 2023
R-matrix parameter covariances for light elements with A 16 are calculated within the Wigner-Eisenbud multichannel unitary R-matrix theory. We review the theoretical foundation, numerical approach, and determination of the parameter covariances within this approach. We derive the relation between the parameter variance, as the diagonal elements of the covariance matrix, and the parameter confidence interval based upon the chi-squared distribution. Cross section covariances computed from the parameter confidence intervals are calculated for several compound systems and discussed.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
