“Neutron capture today” = description of actions and results from the indc(nds) – 0886 (2023) tbp

• Jiri Kopecky

Room: MOE10 The low mass A < 70 targets have been revisited and improved and delivered to NDS as an upgrade to the NDS PSF data base. The available information on the direct capture DC contributions has been surveyed and its contribution to the total E1 and M1 primary strength established. The primary data - The achieved improvements in recent thermal neutron capture data have been acknowledged and in detail tested for 57Fe data. The main improved feature is the extension of low energy Eg detection limit close to zero energy. The primary transitions, assigned with the improved arguments and accuracies of the determined decay schemes allow to address the “upbend” region directly and not by the shape trend analysis as in many earlier attempts. The 57Fe preliminary comparison between different PSF experimental data suggests the need to re-analyse many low energy PSF data with the THC high quality data. The secondary data -The wealth of secondary transitions, assigned with the same accuracy as the primaries, offer the possibility to study the PSF data using the decay of bound levels with Ex < Bn. This is a novel approach, which allows to study the PSF behaviour not only for the Eg dependence but also as a function of the position of the Ex energy in the decay scheme. This method is in the state of testing.

Update on theoretical photon strength functions

• Stephane Goriely

Room: MOE10 The following action points will be presented - Theoretical estimates of the photon strength function (PSF) in 1MeV energy bins - Test of the microscopic BSk27+QRPA PSF on MSC spectra - Test of theoretical PSF on (p,p’) data - Test of the new 2023 PSF library

Update on PSFs from coincidence measurements following neutron capture

• Milan Krtička (Charles University, Prague)

Room: MOE10 - Details of comparison of predictions with BSK27 Skyrme interaction with MSC spectra will be given - Update on PSFs from analysis of MSC spectra reached after the end of the CRP

Report on assigned actions

• Mathis Wiedeking

Room: MOE10 I will go over all actions which were assigned to me during the meeting last year and give a status update on each.

Photon Strength Function database –current status and next steps

• Paraskevi DIMITRIOU (International Atomic Energy Agency)

Room: MOE10 The following issues/assignments will be discussed: - updating the database - new HIgS data - Photonuclear data update - new interactive interface (to be presented by Sandile Jongile) The next steps should be to perform an evaluation of the PSF data. The proposal is to apply a no-model evaluation using statistical methods such as Bayesian Inference. An important prerequisite for such an evaluation is to carefully select consistent experimental data.