Low‐energy continuum‐electron emission at 0° from Oq++He collisions

Low‐energy continuum‐electron emission along the beam direction, i.e., at o°, has been investigated for 1.1–6.2 keV/u O8+ and 2.6 keV/u Oq+ (q=3, 6, and 8) colliding with He. Spectra were obtained for continuum electrons associated with bound‐state capture and with no projectile charge change, respectively. As for previous measurements for 3.75 keV/u O6++He, continuum electrons at 0° were observed only when accompanied by bound‐state capture. Cross sections for these continuum electrons are found to be increasing functions of both the projectile energy and the charge state over the ranges investigated.