K. Kroneberger et al., BEAM-FOIL CONVOY ELECTRONS EMERGING FROM UNCLEANED AND CLEANED SURFACES IN COINCIDENCE WITH CHARGE-ANALYZED PROJECTILES INCLUDING NEUTRALS, Journal of physics. B, Atomic molecular and optical physics, 29(16), 1996, pp. 3727-3740
We discuss measurements of convoy electrons performed with incident H (50, 150 keV) and He+ (100, 200, 400 keV) ions, in coincidence with c
harge-analysed projectiles emerging from thin (150-250 Angstrom) C and
Cu foils. A strong dependence of convoy electron yields on the projec
tile charge, as well as cusp-electron spectra in coincidence with neut
rals are observed and compared with the characteristics of presently a
vailable models for beam-foil convoy electron emission. Measurements p
erformed with sputter-cleaned target surfaces confirm that the transmi
ssion through the surface potential is important in determining both t
he coincident convoy electron yields and the final charge distribution
of the emerging projectiles.