White light transverse cooling of a helium beam E. Rasel, F. Pereira Dos Santos, F. Saverio Pavone, F. Perales, C. S. Unnikrishnan and M. Leduc Eur. Phys. J. D, 7 3 (1999) 311-316 Published online: 15 October 1999 DOI: 10.1007/s100530050573