Convolution approximation for the energy loss, ionization probability and straggling of fast ions

Convolution approximation for the energy loss, ionization probability and straggling of fast ions

Fast ion surface energy loss and straggling in the surface wake fields.

We have measured the stopping powers and straggling of fast, highly ionized atoms passing through thin bilayer targets made up of metals and insulators. We were surprised to find that the energy losses as well as the straggling depend on the ordering of the target and have small but significantly different values on bilayer reversal. We ascribe this newly found difference in energy loss to the ...

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

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 exper...

Energy-loss straggling of 2–10 MeV/u Kr ions in gases

Christof Vockenhuber, Jens Jensen, Jaakko Julin, Heikki Kettunen, Mikko Laitinen, Mikko Rossi, Timo Sajavaara, Orkhan Osmani, Andreas Schinner, Peter Sigmund and Harry J Whitlow, Energy-loss straggling of 2–10 MeV/u Kr ions in gases, 2013, European Physical Journal D: Atomic, Molecular and Optical Physics, (67), 7. http://dx.doi.org/10.1140/epjd/e2013-40095-4 Copyright: EDP Sciences: EPJ http:/...

Impact of Extended Charge Distribution on Energy-Loss Straggling of Heavy Ions

The energy-loss straggling of partially ionized heavy ions is determined by the stochastic fluctuations of the energy loss in atomic collisions remaining in a fixed charge state, (collisional straggling) and by the influence of charge-state fluctuations (charge-exchange straggling) [1, 2]. Besides the charge-changing cross sections the charge-exchange straggling depends critically on the differ...