离子径迹中次级电子和活性组分的输运
Transport of secondary electrons and reactive species in ion tracks
摘要：
分析了离子穿越类组织介质所引起的活性种的传输。由离子发射的次级电子能够电离其他分子;使用无规行走近似研究这些电子的传输，直到这些电子保持弹道。然后，得到了低能电子与水分子相互作用产生的溶剂化电子的分布。由离子和次级电子到介质的能量损失的径向分布产生初始径向剂量分布，该初始径向剂量分布可用作预测冲击波的初始条件。研究了液态水中羟基自由基的形成、扩散和化学演化过程。
英文摘要：
The transport of reactive species brought about by ions traversing tissue-like medium is analysed analytically. Secondary electrons ejected by ions are capable of ionizing other molecules; the transport of these generations of electrons is studied using the random walk approximation until these electrons remain ballistic. Then, the distribution of solvated electrons produced as a result of interaction of low-energy electrons with water molecules is obtained. The radial distribution of energy loss by ions and secondary electrons to the medium yields the initial radial dose distribution, which can be used as initial conditions for the predicted shock waves. The formation, diffusion, and chemical evolution of hydroxyl radicals in liquid water are studied as well.
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