Fission dynamics, dissipation, and clustering at finite temperature

• DOI: 10.1103/physrevc.107.014303
• Publication Date: 2023-01-05T15:29:10Z
• Authors: B. Li; D. Vretenar; Z. X. Ren; T. Nikšić; J. Zhao; P. W. Zhao; J. Meng
• Keywords: Nuclear fission; Saddle point; Bond cleavage

The saddle-to-scission dynamics of the induced fission process is explored using a microscopic finite-temperature model based on time-dependent nuclear density functional theory (TDDFT), that allows to follow evolution local temperature along trajectories. Starting from corresponds experimental excitation energy compound system, propagates nucleons isentropic paths toward scission. For four illustrative cases $^{240}$Pu, $^{234}$U, $^{244}$Cm, and $^{250}$Cf, characteristic trajectories are considered, partition total into various kinetic potential contributions at scission analyzed, with special emphasis dissipated path prescission energy. also applied neck formation rupture, characterized by few-nucleon clusters in low-density region between nascent fragments.