Speaker
Description
Average resonance parameters, particularly the average resonance spacing, derived from experimental neutron-resonance data are essential for many nuclear-physics applications, including testing level-density models and normalizing experimental results. Two widely used compilations are the IAEA RIPL-3 database [1] and Said Mughabghab’s Atlas of Neutron Resonances (latest edition 2018) [2]. However, the methodologies and uncertainty treatments used to obtain the published values are not well documented in either source. The IAEA Coordinated Research Project "Updating and Improving Nuclear Level Densities for Applications" (2024–2028) [3] has suggested a new evaluation of these parameters. Preliminary results of this new evaluation will be presented with a special emphasis on reproducibility of the results and on the treatment of different uncertainties.
[1] R. Capote et al., Nucl. Data Sheets 110, 3107 (2009).
[2] S. F. Mughabghab, Atlas of Neutron Resonances: Resonance Properties and Thermal Cross Sections Z=1-60 & Z=61-102 (Elsevier,
Amsterdam, 2018)
[3] https://www.iaea.org/projects/crp/f41034