Lynch D J, Wilson W E, Batdorf M T, Sowa Resat M B, Kimmel G A, Miller J H
Washington State University Tri-Cities, Richland, Washington, 99352, USA.
Radiat Res. 2005 Apr;163(4):468-72. doi: 10.1667/rr3341.
Dosimetry calculations characterizing the spatial variation of the energy deposited by the slowing and stopping of energetic electrons are reported and compared with experimental measurements from an electron microbeam facility. The computations involve event-by-event, detailed-histories Monte Carlo simulations of low-energy electrons interacting in water vapor. Simulations of electron tracks with starting energies from 30 to 80 keV are used to determine energy deposition distributions in thin cylindrical rings as a function of penetration and radial distance from a beam source. Experimental measurements of the spatial distribution of an electron microbeam in air show general agreement with the density-scaled simulation results for water vapor at these energies, yielding increased confidence in the predictions of Monte Carlo track-structure simulations for applications of the microbeam as a single-cell irradiator.
报告了表征高能电子减速和停止过程中能量沉积空间变化的剂量学计算结果，并与电子微束装置的实验测量结果进行了比较。这些计算涉及对低能电子在水蒸气中相互作用的逐个事件、详细历史的蒙特卡罗模拟。使用起始能量为30至80keV的电子轨迹模拟来确定薄圆柱环中的能量沉积分布，该分布是穿透深度和距束源径向距离的函数。空气中电子微束空间分布的实验测量结果与这些能量下水蒸气的密度缩放模拟结果总体一致，这增强了对蒙特卡罗轨迹结构模拟预测的信心，该模拟可用于微束作为单细胞辐照器的应用。
