Material dependence on the mean charge state of light ions in titanium, zirconium and copperJennifer Schofield, Jay A. LaVerne, Daniel Robertson, Philippe Collon and Simon M. PimblottEur. Phys. J. D, 73 10 (2019) 211DOI: https://doi.org/10.1140/epjd/e2019-100144-8