Continuum radiation emitted from transition metals under ion bombardment A. El Boujlaidi, M. Ait El Fqih, K. Hammoum, H. Aouchiche and A. Kaddouri Eur. Phys. J. D, 66 10 (2012) 273 Published online: 25 October 2012 DOI: 10.1140/epjd/e2012-30347-2