Uncertainty quantification for nuclear level densities and y-ray strength functions from the Oslo method and beyond
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- Fysisk institutt [3659]
Sammendrag
Despite the quantum mechanical nature of the atomic nucleus, many important properties of nuclei and nuclear reactions can be well described by average statistical properties. Our knowledge of these properties does not only influence our basic understanding of the nucleus, but may also affect various applications ranging from cancer treatment within nuclear medicine, to astrophysics and the question of how our universe was formed. Given the potentially immense impact of new experimental observations of these statistical properties, it is imperative to improve our understanding of the uncertainties of the results: “with great power must also come – great responsibility”. To facilitate a more sophisticated statistical analysis of the data, the author has programmed a comprehensive revision of the software package used in the so-called Oslo method. Furthermore, current limits on the applicability of the method are explored. A new viewpoint for the analysis is established that allows for a simultaneous exploration of different experiments and may in addition overcome these constraints. Finally, a proof-of-concept was performed on how experiments at the Oslo Cyclotron Laboratory can also be used to extract information on nuclear fission properties.Artikkelliste
Paper I: Midtbø, J. E., Zeiser, F., Lima, E. Larsen, A. C. Tveten, G. M. Guttormsen, M. Bello Garrote, F. L. Kvellestad, A. and Renstrøm, T. “A new software implementation of the Oslo method with rigorous statistical uncertainty propagation”. Computer Physics Communications. Vol. 262 (2021) 107795. DOI: 10.1016/j.cpc.2020.107795. The article is included in the thesis. Also available at: https://doi.org/10.1016/j.cpc.2020.107795 |
Paper II: Zeiser, F., Tveten, G. M., Bello Garrote, F. L., Guttormsen, M., Larsen, A. C., Ingeberg, V. W., Görgen, A. and Siem, S. “The y-ray energy response of the Oslo Scintillator Array OSCAR”. To appear in: NIM A. Vol. 985, (2021) 164678, DOI: 10.1016/j.nima.2020.164678. arXiv: 1708.04101. The article is included in the thesis. Also available at: https://doi.org/10.1016/j.nima.2020.164678 |
Paper III: Zeiser, F., Potel, G., Tveten, G. M., Larsen, A. C., Guttormsen, M., Laplace, T. A., Siem, S., Bleuel, D. L., Goldblum, B. L., Bernstein, L. A., Bello Garrote, F. L., Crespo Campo, L., Eriksen, T. K., Hadynska-Klek, K., A. Görgen K., Midtbø, J. E., Renstrøm, T., Sahin, E., Tornyi, T., Voinov, A. and Wiedeking, M. “Impact of restricted spin-ranges in the Oslo Method: The example of (d, p)240Pu”. Accepted for publication in: Proceedings of the Compound Nuclear Reactions Workshop, Berkeley 2018. arXiv: 1902.02966. To be published. The paper is not available in DUO awaiting publishing. |
Paper IV: Zeiser, F., Tveten, G. M., Potel, G., Larsen, A. C., Guttormsen, M., Laplace, T. A., Siem, S., Bleuel, D. L., Goldblum, B. L., Bernstein, L. A., Garrote, F. L. Bello, Campo, L. Crespo, Eriksen, T. K., Görgen, A., Hadynska-Klek, K., Ingeberg, V. W., Midtbø, J. E., Sahin, E., Tornyi, T., Voinov, A., Wiedeking, M. and Wilson, J. “Restricted spin-range correction in the Oslo method: The example of nuclear level density and y-ray strength function from 239Pu(d, p)240Pu”. In: Physical Review C. Vol. 100 (2019) 024305, DOI: 10.1103/physrevc.100.024305. arXiv: 1904.02932. The article is included in the thesis. Also available at: https://doi.org/10.1103/physrevc.100.024305 |
Paper V: Zeiser, F. and Kvellestad, A. “gledeli: Gamma-ray strength function and nuclear LEvel DEnsity LIkelihoods”. Manuscript in preparation. To be published. The paper is not available in DUO awaiting publishing. |
Paper VI: Rose, S. J., Zeiser, F., Wilson, J. N., Oberstedt, A., Oberstedt, S., Siem, S., Tveten, G. M., Bernstein, L. A., Bleuel, D. L., Brown, J. A., Crespo Campo, L., Giacoppo, F., Görgen, A., Guttormsen, M., Hadynska, K., Hafreager, A., Hagen, T. W., Klintefjord, M., Laplace, T. A., Larsen, A. C., Renstrøm, T., Sahin, E., Schmitt, C., Tornyi, T. G. and Wiedeking, M. “Energy dependence of the prompt -ray emission from the (d, p)-induced fission of 234U* and 240Pu*”. In: Physical Review C. Vol. 96 (2017) 014601. DOI: 10.1103/PhysRevC.96.014601. arXiv: 1707.01651. The article is included in the thesis. Also available at: https://doi.org/10.1103/PhysRevC.96.014601 |