About this Abstract |
Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
Presentation Title |
Quantifying the Impact of an Electronic Drag Force on Defect Production from High-Energy Displacement Cascades in α-zirconium |
Author(s) |
Jose F. March-Rico, C. Miller McSwain, Brian D. Wirth |
On-Site Speaker (Planned) |
Jose F. March-Rico |
Abstract Scope |
Defect production following displacement cascades with PKA energies up to 40 keV is compared between two conditions in α-zirconium: 1) considering only nuclear stopping effects and 2) considering simultaneous nuclear and electronic stopping. Electronic energy losses are implemented as a drag force with strength proportional to the energy-dependent stopping power as predicted by SRIM calculations. This adjustment is performed using a new and user-friendly command, “fix electron/stopping”, innately available in the LAMMPS software. We find that electronic energy losses result in a 10 – 20 % reduction in the surviving damage produced by high-energy PKAs, and this should be accounted for when considering defect generation rates in mesoscale codes. This method of electronic energy loss implementation predicts nuclear damage energies that are comparable with the SRIM-predicted values when using the full-cascade TRIM calculation, as has recently been recommended to the community. |
Proceedings Inclusion? |
Undecided |