Year: 2024
Type: article
Abstract: We employ a microscopic method to study how isospin affects the fission potential of $^{240}\mathrm{Pu}$. Our approach uses constrained Hartree-Fock theory (CHF) which allows us to separately investigate the isoscalar and isovector properties of the nuclear energy density functional (EDF). By analyzing the isoscalar and isovector components of the EDF along the fission path we can assess the isovector contribution to fission barriers. We study this effect for the fully adiabatic path to scission. The isovector component of the fission potential is found to increase in magnitude as the nucleus evolves towards scission, exemplifying the importance of stringent constraints on the isovector sector of the nuclear EDF for reliable predictions of fission properties.
Source: Physical Review C
Authors: K. Godbey, Christian Ross, A. S. Umar
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: LOW ENERGY NUCLEAR REACTIONS USING TIME DEPENDENT DENSITY FUNCTIONAL THEORY, MICHIGAN STATE UNIVERSITY (MSU) WILL CARRY OUT A PROGRAMMATIC STUDY OF THE FISSION PROCESS IN NUCLEI, BASED ON SELF-CONSISTENT DENSITY FUNCTIONAL THEORY AND ITS EXTENSIONS, FOCUSING ON MEDIUM-MASS NUCLEI AND THE ACTINIDE AND TRANSACTINIDE REGIONS. THEY PERFORM SYSTEMATIC SELF-CONSISTENT CALCULATIONS OF TO ESTIMATE SPONTANEOUS FISSION LIFETIMES AND MASS AND CHARGE FRAGMENT YIELDS USING DYNAMIC ADIABATIC APPROACHES. TO ESTIMATE THEORETICAL UNCERTAINTIES, THEY APPLY ADVANCED METHODS OF UNCERTAINTY QUANTIFICATION SUCH AS BAYESIAN MACHINE LEARNING AND BAYESIAN MODEL MIXING. TO CARRY OUT LARGE-SCALE FISSION STUDIES, THEY APPLY MACHINE LEARNING TECHNIQUES TO EMULATE EXPENSIVE SIMULATIONS AND TO REDUCE THE COLLECTIVE SPACE OF COMPUTATIONS., G7595064423
OpenAlex ID: W4403683900