Uncertainty quantification has been growing in prominence over the last several years, especially in a range of nuclear theory communities, from ab initio to phenomenological models and effective field theories to density functional theories. Most of this uncertainty quantification has been focused on parametric uncertainties that arise from fitting to experimental data and how these...
Neural Networks as Emulators for DFT Calculations
Daniel Lay${}^{1,2}$, Eric Flynn${}^{1,2}$, Samuel Giuliani$^3$, Witold Nazarewicz$^{1,2}$, Leo Neufcourt$^1$
$^1$Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.
$^2$Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA....
While the importance of nuclear fission as a many-body decay process is well-established, a full understanding of the myriad pathways explored by fissioning systems has remained elusive. Each of these pathways explored by the compound nuclei can result in vast differences in the fission products and directly influences the charge, masses, energies, and angular momenta of the outgoing...
Over 80 % of the energy release in fission is in the form of the kinetic energy of the fission fragments. We have used the LANSCE facility at Los Alamos to measure the total kinetic energy release in the fast neutron (En=1-100 MeV) fission of 232Th[1], 235U[2], 237Np[3], 239Pu[4], 240Pu, and 242Pu. The neutron energies were deduced from time of flight measurements and the fragment energies...
The nuclear fission process has been known for over eighty years, yet its description in a consistent theoretical framework is still lacking. Fully microscopic descriptions of the fission process are a promising route that allows us to build a theory of fission directly related to in-medium nuclear forces. So far, microscopic methods have been applied exclusively on even-even isotopes due to...
The study of the fission process is considered presently mostly important not only for searching pathways to synthesize new superheavy elements and to predict their stability against fission, but also for the direct impact on the understanding of the fission recycling process in r-process of nucleosynthesis. A description of the fission process with reliable predictive power is therefore...
