Real-Time Electron Solvation Induced by Bursts of Laser-Accelerated Protons in Liquid Water

Understanding the mechanisms of proton energy deposition in matter and subsequent damage formation is fundamental to radiation science. Here we exploit the picosecond (10(-12) s) resolution of laser-driven accelerators to track ultrafast solvation dynamics for electrons due to proton radiolysis in liquid water (H2O). Comparing these results with modeling that assumes initial conditions similar to those found in photolysis reveals that solvation time due to protons is extended by > 20 ps. Supported by magneto-hydrodynamic theory this indicates a highly dynamic phase in the immediate aftermath of the proton interaction that is not accounted for in current models.

Automated summary

Understanding proton energy deposition and damage formation in matter is crucial for radiation science. Using picosecond resolution of laser-driven accelerators, ultrafast solvation dynamics for electrons due to proton radiolysis in liquid water were tracked. Results suggest a highly dynamic phase after proton interaction that current models do not account for, supported by magneto-hydrodynamic theory.