DEPENDENCE OF CONVOY ELECTRON EMISSION ON SURFACE PROPERTIES AND TARGET MATERIAL H. ROTHARD, M. BURKHARD, C. BIEDERMANN, J. KEMMLER, K. KRONEBERGER, P. KOSCHAR, O. HEIL, D. HOFMANN and K.O. GROENEVELD J. Phys. Colloques, 48 C9 (1987) C9-215-C9-218 DOI: 10.1051/jphyscol:1987933