Abstract
Differential charge-transfer cross sections are measured for in Ar at energies from 65 to 300 eV and angles from 1° to 30°. The relative measurements are calibrated by comparison with total charge-transfer measurements of Koopman. From reduced plots of versus , two, and perhaps three families of oscillations are identified, with reduced angular thresholds at eV deg and with spacing between peaks near threshold related to the wave number by the rule a. u., respectively. Using potential curves constructed from earlier information on elastic scattering, the first family is identified as arising from a crossing at 2.9 a. u. to a state dissociating to , and the second from a crossing at 2.3 a. u. to a state producing . Further crossings at distances between 2.25 and 1.95 a. u. leading to other excited-state channels are apparently responsible for more than half of all the charge transfer at these energies.
- Received 3 February 1970
DOI:https://doi.org/10.1103/PhysRevA.2.379
©1970 American Physical Society