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Table 1

Radiolysis processes considered in the simulations, including branching ratios, G-values, process types, and calculated stopping powers (10−14 eV cm2 molecule−1) for each species.

Reaction fbr G-value Type
H2O
Se(200 keV) = 1.93
H2O → OH* + H* 0.9 3.704 R1
H2O ⤳ O* + H2∗Mathematical equation: $\[\mathrm{H}_2^*\]$ 0.1 3.704 R1
H2O ~ OH + H 0.9 1.747 R2
H2O → O + H2 0.1 1.747 R2
H2O → H2O* 1.0 1.747 R3
O2
Se(5 keV) = 0.93, Se(200 keV) = 2.61
O2 ⤳ O* + O* 1.0 3.704 R1
O2 ⤳ O + O 1.0 2.138 R2
O2 ⤳ O2∗Mathematical equation: $\[\mathrm{O}_2^*\]$ 1.0 2.138 R3
O3
Se(5 keV) = 1.42, Se(200 keV) = 4.00
O3 ⤳ O2∗Mathematical equation: $\[\mathrm{O}_2^*\]$ + O* 1.0 3.704 R1
O3 ⤳ O2 + O 1.0 4.059 R2
O3 ⤳ O3∗Mathematical equation: $\[\mathrm{O}_3^*\]$ 1.0 4.059 R3
O2H
Se(200 keV) = 3.02
O2 ⤳ O* + OH* 0.5 3.704 R1
O2H ⤳ H* + O2∗Mathematical equation: $\[\mathrm{O}_2^*\]$ 0.5 3.704 R1
O2H ⤳ O + OH 0.5 3.714 R2
O2H ⤳ H + O2 0.5 3.714 R2
O2H ⤳ HO2∗Mathematical equation: $\[\mathrm{HO}_2^*\]$ 1.0 3.714 R3
H2O2
Se(200 keV) = 3.38
H2O2 ⤳ OH* + OH* 0.5 3.704 R1
H2O2 ~ H* + O2H* 0.5 3.704 R1
H2O2 ⤳ OH + OH 0.5 2.296 R2
H2O2 ⤳ H + O2H 0.5 2.296 R2
H2O2 ⤳ H2O2∗Mathematical equation: $\[\mathrm{H}_2 \mathrm{O}_2^*\]$ 1.0 2.296 R3
O
Se(5 keV) = 0.47, Se(200 keV) = 1.33
O ⤳ O* 1.0 3.70 R1
O ~ O* 1.0 1.93 R3
H2
Se (200 keV) = 0.35
H2 → H* + H* 1.0 3.70 R1
H2 ⤳ H + H 1.0 1.02 R2
H2 ⤳ H2∗Mathematical equation: $\[\mathrm{H}_2^*\]$ 1.0 1.02 R3
OH
Se (200 keV) = 1.69
OH ⤳ O* + H* 1.0 3.70 R1
OH ⤳ O + H 1.0 5.66 R2
OH ⤳ OH* 1.0 5.66 R3

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