Microscopic analysis of induced nuclear fission dynamics

Scientific paper - Original scientific paper

• Author: Z. X. Ren
• Author: J. Zhao
• Author: Dario Vretenar
• Author: Tamara Nikšić
• Author: P. W. Zhao
• Author: J. Meng
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The dynamics of low-energy-induced fission is explored using a consistent microscopic framework that combines the time-dependent generator coordinate method (TDGCM) and time-dependent nuclear density functional theory (TDDFT). While the former presents a fully quantum mechanical approach that describes the entire fission process as an adiabatic evolution of collective degrees of freedom, the latter models the dissipative dynamics of the final stage of fission by propagating the nucleons independently toward scission and beyond. The two methods, based on the same nuclear energy density functional and pairing interaction, are employed in an illustrative study of the charge distribution of yields and total kinetic energy for induced fission of 240Pu. For the saddle-to-scission phase a set of initial points for the TDDFT evolution is selected along an isoenergy curve beyond the outer fission barrier on the deformation energy surface, and the TDGCM is used to calculate the probability that the collective wave function reaches these points at different times. Fission observables are computed using both methods and compared with available data.

• Keywords (english): fission; time-dependent generator coordinate method (TDGCM); time-dependent nuclear density functional theory (TDDFT)
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review C
• Numbering: vol. 105, no. 4, 044313
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.105.044313
• URN:NBN: urn:nbn:hr:217:223349
• Publication: 2022
• Project: Number: IP-2018-01-5987; Title (croatian): Kvantificiranje neodređenosti u formalizmu nuklearnih energijskih funkcionala gustoće; Title (english): Uncertainty Quantification within the nuclear energy density functional framework; Acronym: NucEDF; Leader: Tamara Nikšić; Jurisdiction: Croatia; Funding stream: Research Projects
• Project: Number: KK.01.1.1.01.0004; Title (croatian): Provedba vrhunskih istraživanja u sklopu Znanstvenog centra izvrsnosti za kvantne i kompleksne sustave te reprezentacije Liejevih algebri; Title (english): Implementation of top research within the Scientific Center of Excellence for Quantum and Complex Systems, and Representations of Lie Algebras; Acronym: QuantiXLie; Leader: Hrvoje Buljan; Jurisdiction: eu; Funding stream: European Regional Development Fund
• Document URL: https://link.aps.org/doi/10.1103/PhysRevC.105.044313
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2022 American Physical Society. Received 29 November 2021; revised 16 March 2022; accepted 5 April 2022; published 18 April 2022.
• Created on: 2024-08-31 17:25:25