Mass spectrometric measurements of clusters containing N helium atoms
and an NO molecule yield probabilities for charge transfer from He+ to
NO that range from 0.8+/-0.1 for [N]=540 to 0.02+/-0.02 for [N] = 15
000. From this we estimate that the He+ hole hops approximately 70 tim
es before localization at a He-2(+) core. (C) 1996 American Institute
of Physics.