A. Naji et al., ASSOCIATIVE IONIZATION IN COLLISIONS OF HE- AND D-( WITH H), Journal of physics. B, Atomic molecular and optical physics, 31(13), 1998, pp. 2961-2970
Absolute cross sections of the associative ionization in the collision
of He+ with H- D- have been measured in a merged beam experiment over
a relative velocity interval ranging from 0.4 to 5 x 10(6) cm s(-1).
At a given relative velocity, the two cross sections significantly dif
fer at low velocities where the cross section for HeD+ formation excee
ds that of HeH+ by as much as 35%. The difference, however, decreases
with the velocity and falls in the experimental error above 2 x 10(6)
cm s(-1). In both cases the energy dependence becomes compatible at lo
w energy with an E-1 law.