Computational analysis of the spatial distributions of low-energy electrons generated via water photolysis and photoinjection into electrodes in water

Kai, Takeshi   ; Toigawa, Tomohiro   ; Matsuya, Yusuke*  ; Hirata, Yuho   ; Tsuchida, Hidetsugu*; Yokoya, Akinari*

Scientific knowledge of low-energy electrons resulting from water radiolysis is required to estimate radiation DNA damage. However, since the analysis of water radiolysis is very complex, this study focuses on the experimental values of low-energy electrons related to simple water photolysis and those generated by photoirradiation of electrodes in water. Both experimental analyses involve the presence or absence of a Coulomb field in the parent ion. In this study, we analyzed these experimental values using a calculation code that combines Monte Carlo and molecular dynamics methods. As a result, it was shown that the code reproduced the experimental values even under different experimental conditions, and the code was validated. The calculation code will be a powerful tool for analyzing the interaction between low-energy electrons and DNA, and is expected to be applied to elucidate the formation mechanism of radiation DNA damage.