Speaker
Description
Reliable uncertainty estimation of both the unfolded experimental data and of the theoretical model is utmost to obtain adequate Chi-square estimation when fitting model parameters to the experimental gamma-ray spectra. To do that, preparation steps of experimental spectra had already been presented in Ref. [1] with complete uncertainty estimation. The obtained unfolded spectrum can then be directly compared to the model-provided spectrum, however, in the case of the extreme statistical model, such as BITS [2] lacked the missing uncertainty estimation, thus reliable Chi-square value.
In the talk, the complete uncertainty estimation will be presented on the example of several measured gamma spectra, including ones from radiative neutron capture. This achievement helps to decide which photon strength function parameter set is the best to describe the experimental spectrum. High-resolution comparison of experimental and model calculated spectra helps to develop decay-schemes [3] will be discussed too.
References
[1] T. Belgya, L. Szentmiklósi, Monte-Carlo calculated detector response functions to unfold radiative neutron capture spectra, Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip. 991 (2021) 165018. doi:10.1016/j.nima.2021.165018.
[2] S. Goriely, P. Dimitriou, M. Wiedeking, T. Belgya, R. Firestone, J. Kopecky, M. Krticka, V. Plujko, R. Schwengner, S. Siem, H. Utsunomiya, H. S, S. Péru, Y.S. Cho, D.M. Filipescu, N. Iwamoto, T. Kawano, V. Varlamov, R. Xu, Reference database for photon strength functions, Eur. Phys. J. A. 55 (2019) 172–224. doi:10.1140/epja/i2019-12840-1.
[3] T. Belgya, L. Szentmiklósi, R. Massarczyk, R. Schwengner, A.R. Junghans, E. Grosse, High-resolution study of the 113Cd (n, γ) spectrum by statistical decay model with discrete levels and transitions, in: EPJ Web Conf., EDP Sciences, (2017) 05009.