Charge exchange between slow highly charged ions and laser-excited Rydberg atoms

Charge-transfer collisions between slow multiply charged ions and highly excited Rydberg atoms have been studied to determine the details of the internal energy transfer accompanying charge exchange. The experiment uses lasers to define uniquely the binding energies of both initial and final states of the collision, thereby eliminating the ambiguity inherent in the selective field ionization method used for previous studies. The results clearly characterize the capture energetics over the range of ion charge $q=1--11$ and velocity $v=0.031--0.138\mathrm{a}.\mathrm{u}.$ The measurements are in very good agreement with predictions of the classical trajectory Monte Carlo method, but not with predictions of other classical models.Charge-transfer collisions between slow multiply charged ions and highly excited Rydberg atoms have been studied to determine the details of the internal energy transfer accompanying charge exchange. The experiment uses lasers to define uniquely the binding energies of both initial and final states of the collision, thereby eliminating the ambiguity inherent in the selective field ionization method used for previous studies. The results clearly characterize the capture energetics over the range of ion charge $q=1--11$ and velocity $v=0.031--0.138\mathrm{a}.\mathrm{u}.$ The measurements are in very good agreement with predictions of the classical trajectory Monte Carlo method, but not with predictions of other classical models.

Physical Review AApr 17, 200112 citations

Rydberg Atom-Molecule Charge-Exchange Reactions

R. N. Compton

Kluwer Academic Publishers eBooksDec 10, 20050 citations

Energy Transfer in Charge Exchange Collisions between Slow Ions and Rydberg Atoms

D. S. Fisher, C. W. Fehrenbach, S. R. Lundeen +2 more

Charge transfer collisions between slow ions and Rydberg atoms have been studied for ion charges $q\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1--4$ , using resonant laser excitation to detect specific energy states of the collision products. The data collected show a clear resonance in the capture cross section to a particular energy state as the binding energy of the Rydberg target is varied. The resonance position differs significantly from the predictions of the classical overbarrier model, and its width becomes very small (0.025 eV) at the lowest velocities studied.Charge transfer collisions between slow ions and Rydberg atoms have been studied for ion charges $q\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1--4$, using resonant laser excitation to detect specific energy states of the collision products. The data collected show a clear resonance in the capture cross section to a particular energy state as the binding energy of the Rydberg target is varied. The resonance position differs significantly from the predictions of the classical overbarrier model, and its width becomes very small (0.025 eV) at the lowest velocities studied.

Physical Review LettersAug 31, 199811 citations

Rydberg states in multiply charged ions

A. E. Livingston

UnknowMay 1, 19930 citations

q=1--11

and velocity

v=0.031--0.138\mathrm{a}.\mathrm{u}.

The measurements are in very good agreement with predictions of the classical trajectory Monte Carlo method, but not with predictions of other classical models.

Charge transfer collisions between slow ions and Rydberg atoms have been studied for ion charges

q\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1--4

, using resonant laser excitation to detect specific energy states of the collision products. The data collected show a clear resonance in the capture cross section to a particular energy state as the binding energy of the Rydberg target is varied. The resonance position differs significantly from the predictions of the classical overbarrier model, and its width becomes very small (0.025 eV) at the lowest velocities studied.