Paretzke H G, Turner J E, Hamm R N, Ritchie R H, Wright H A
GSF-Institut für Strahlenschutz, Neuherberg, Federal Republic of Germany.
Radiat Res. 1991 Aug;127(2):121-9.
The spatial distributions of ionizations and other inelastic events in charged-particle tracks are important quantities that influence the final outcome of radiation interaction. Calculations of such distributions are presented for the tracks of electrons in the energy range 100 eV to 10 keV in liquid water and water vapor, and the results are compared. The distributions include the frequency of nearest-neighbor distances for all inelastic events, the mean nearest-neighbor distances for ionizations and for all inelastic events as a function of electron energy, the frequency of distances between all ionizations and all inelastic events, and the farthest distances between all inelastic events in electron tracks. The physical differences between liquid water and water vapor are discussed in terms of the respective inverse mean free paths, the collision spectra, and the nonlocalization of energy losses that are likely to occur in the liquid.
带电粒子径迹中电离及其他非弹性事件的空间分布是影响辐射相互作用最终结果的重要量。本文给出了能量范围为100 eV至10 keV的电子在液态水和水蒸气中的径迹的此类分布计算结果，并进行了比较。这些分布包括所有非弹性事件的最近邻距离频率、电离及所有非弹性事件的平均最近邻距离随电子能量的变化函数、所有电离与所有非弹性事件之间的距离频率，以及电子径迹中所有非弹性事件之间的最远距离。从各自的逆平均自由程、碰撞谱以及液态中可能发生的能量损失的非定域性方面讨论了液态水和水蒸气之间的物理差异。
