Bimodal range distributions of low-energy carbon ions in tetrahedral amorphous carbon P. Neumaier, A. Bergmaier, W. Eckstein, R. Fischer, H. Hofsäss, H. U. Jäger, H. Kröger, C. Ronning and G. Dollinger EPL, 90 4 (2010) 46002 Published online: 04 June 2010 DOI: 10.1209/0295-5075/90/46002