A re-encounter model is proposed for electron-ion recombination on low
-LET tracks in liquid argon. Consistency with measured escape probabil
ity for fields > 1 kV cm(-1) requires an encounter recombination proba
bility approximate to 0.01. The initial e-ion separation (approximate
to 1500-1800 nm) is reconciled with thermalization by elastic collisio
ns. Due to homogeneous recombination the experimental values fall belo
w the calculated ones for fields less than approximate to 1 kV cm(-1).