ELECTRON IMPACT SINGLE IONIZATION OF Niq+ (q=10, 13 and 15) S. Cherkani-Hassani, P. Defrance and M. Khouilid Institut de Physique, chemin du Cyclotron 2, B-1348 Louvain-la-Neuve, Belgium Absolute cross sections for electron impact single ionization of Ni10+, Ni13+and Ni15+, have been measured in an animated crossed-electron ion beam experiment, in an energy range from threshold to about 5.5 KeV.