ORIGIN OF FAST ELECTRONS FROM SLOW ATOMIC-COLLISIONS - REPLY

We show reasons why negative ions cannot contribute significantly to o ur observation of fast electrons in slow atomic collisions [Phys. Rev. 45, 5286 (1992)]. We point out that the opposite suggestion by Yasui [preceding Comment, Phys. Rev. A 48, 1711 (1993)] results from multipl e errors in his analysis, including inadequate consideration of energy conservation, the use of nonapplicable data from the literature, negl ect of decay in flight of metastable negative ions, nonconsideration o f detection efficiency, and the inconsistent fit of experimental data.