Dynamic behavior of electrons deposited energy in water

Kai, Takeshi   ; Toigawa, Tomohiro   ; Ukai, Masatoshi*; Fujii, Kentaro*; Watanabe, Ritsuko*; Yokoya, Akinari*

Fundamental studies of water radiolysis by radiation and laser irradiation are applied to atomic industry, and provide useful fundamental insights to understanding of radiation DNA damage. We developed a code to simulate dynamic behavior of electrons produced in water by energy deposition at energies, also performed theoretical study for the behaviors. The spatial probability distributions of the electrons depend on the deposition energies, also show the exponential or Gaussian types. We also show calculated results of energy probability distributions of the electrons. We found that the distributions below 100 meV are gradually close to Maxwell distribution with the temporal evolution, while the distributions above 100 meV not depend on the temporal evolution due to effect of Coulombic field of the parent cation. The findings provide significant insights to a connection radiation physics and radiation chemistry.