Ionization of sodium by the impact of alpha particle S. Bhattacharya, K. B. Choudhury, N. C. Deb, C. Sinha, K. Roy and A. Z. Msezane Eur. Phys. J. D, 47 3 (2008) 335-338 Published online: 04 April 2008 DOI: 10.1140/epjd/e2008-00056-8