We have recently extended our previous (D.G. Whyte, R.C. Isler, M.R. Wade, D.R. Schultz, P.S. Krstic, C.C. Hung, and W.P. West, Phys. Plasmas 5, 3694 (1998) calculations for Ar charge-exchange recombination spectroscopy in order to
(1) provide data at different collision energies that are of potential relevance to neutral beam energies at specific experimental facilities, and
(2) augment them with results for a metastable hydrogen target H(2s) owing to the possible small fraction of this state which will have a much larger cross section for charge transfer than H(1s) at low energies.
Specifically, we have calculated with a much large number of trajectories than in the previous work state-selective charge transfer for the 18, 17, 16, and 15+ ions colliding with H(1s) and H(2s) at primary neutral hydrogen (laboratory frame) energies of 40, 70, and 250 keV/u. We have also calculated these results at the 1/2 and 1/3 energies that are commonly present in the beams (i.e., 40, 20, 13.3333; 70, 35, 23.3333; and 250, 125, 83.3333 keV/u).
The tables below give CTMC results for all of these projectile-target combinations and energies. A graph illustrating the results for each case is also provided. A paper describing these calculations is in preparation and will be referenced here when available, hopefully by December 2009. We also note that some of the statistical uncertainties in the CTMC calculations can be improved for channels with very small cross sections. We will update the files for these cases if computer time becomes available to do this.
| 40 keV/u Ar15++H(2s) graph | 40 keV/u Ar16++H(2s) graph | 40 keV/u Ar17++H(2s) graph | 40 keV/u Ar18++H(12) graph |
| 20 keV/u Ar15++H(2s) graph | 20 keV/u Ar16++H(2s) graph | 20 keV/u Ar17++H(2s) graph | 20 keV/u Ar18++H(2s) graph |
| 13.3333 keV/u Ar15++H(2s) graph | 13.3333 keV/u Ar16++H(2s) graph | 13.3333 keV/u Ar17++H(2s) graph | 13.3333 keV/u Ar18++H(2s) graph |
| 70 keV/u Ar15++H(2s) graph | 70 keV/u Ar16++H(2s) graph | 70 keV/u Ar17++H(2s) graph | 70 keV/u Ar18++H(2s) graph |
| 35 keV/u Ar15++H(2s) graph | 35 keV/u Ar16++H(2s) graph | 35 keV/u Ar17++H(2s) graph | 35 keV/u Ar18++H(2s) graph |
| 23.3333 keV/u Ar15++H(2s) graph | 23.3333 keV/u Ar16++H(2s) graph | 23.3333 keV/u Ar17++H(2s) graph | 23.3333 keV/u Ar18++H(2s) graph |
| 250 keV/u Ar15++H(2s) graph | 250 keV/u Ar16++H(2s) graph | 250 keV/u Ar17++H(2s) graph | 250 keV/u Ar18++H(2s) graph |
| 125 keV/u Ar15++H(2s) graph | 125 keV/u Ar16++H(2s) graph | 125 keV/u Ar17++H(2s) graph | 125 keV/u Ar18++H(2s) graph |
| 83.3333 keV/u Ar15++H(2s) graph | 83.3333 keV/u Ar16++H(2s) graph | 83.3333 keV/u Ar17++H(2s) graph | 83.3333 keV/u Ar18++H(2s) graph |