Skewness of energy-loss straggling and multiple-scattering energy distributions

[摘要] Energy spread distributions due to electronic energy-loss straggling and multiple small-angle scattering of swift ions in matter are approximated by asymmetric Gaussian functions consisting of two-piece normal distributions. These skewed energy distributions approximate the distributions more accurately than the conventional approximation by Gaussian functions. The results are compared to experimental data and Monte-Carlo simulations using the MCERD code and are in good agreement. The use of these skewed distributions allows to achieve a higher accuracy in the computer simulation of ion beam analysis energy spectra. (C) 2010 Elsevier B.V. All rights reserved.

[发布日期] 2010-06-01

[效力级别]  Proceedings Paper

[关键词] Energy-loss straggling;Multiple scattering;Energy spread;Skewness;Two-piece normal distribution