Microscopic Evidence for Scission Neutrons

Technical Report · Thu Mar 14 04:00:00 EDT 2024

DOI:https://doi.org/10.2172/2377302· OSTI ID:2377302

Abdurrahman, Ibrahim Abdulmajeed ^[1]; Kafker, Matthew ^[2]; Bulgac, Aurel ^[2]; Stetcu, Ionel ^[1]

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1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
2. Univ. of Washington, Seattle, WA (United States)

We discuss the neck rupture stage of fission and the emission of particles afterwards, two extremely rapid and highly non-equilibrium processes. Currently, the neck rupture cannot be directly probed by experiment, highlighting the importance of reliable theoretical predictions for this stage of fission. Time-dependent density functional theory (TDDFT) is used to simulate the spontaneous fission of ²⁵²Cf. In conjunction with statistical models, inputs from microscopic calculations can be used to make predictions for prompt neutron and gamma emission spectra, quantities which can be experimentally measured. Here we characterize the scission mechanism within TDDFT and estimate the number of scission neutrons and their kinetic energies.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
• DOE Contract Number: 89233218CNA000001; FG02-97ER41014; NA0003841; AC05-00OR22725
• OSTI ID: 2377302
• Report Number(s): LA-UR--23-31053
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS