Measurement of charge exchange between H-2 and low-energy ions with charge states 35<=q<=80

Charge-exchange cross sections for collisions between H-2 and ions with unusually low center-of-mass energies (approximate to 6 eV) and high-charge states (Xe-q+:35,43 less than or equal to q less than or equal to 46,Th-q+:73 less than or similar to q less than or equal to 80) have been measured using a Penning ion trap. A nondestructive measurement technique permitted both primary and product ion analysis. The data, averaged over the charge states indicated above, are consistent with a total cross section that scales linearly with ion charge q. The true double-capture cross section is found to be about 25% of the total cross section at high q. The results are compared to predictions of the absorbing-sphere model.