A comparison of predictions of a one-dimensional simulation model with the
results of a recent experimental study [Appl. Phys. Lett. 76, 544 (2000)] o
f a dc He-Xe microdischarge is presented. The experimental results are rema
rkably reproduced by the model but only when unusually high values are used
for the unknown rate coefficients of formation and recombination reactions
of HeXe+ heteronuclear ions. (C) 2001 American Institute of Physics.