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

Quantum Theory of Ion-Atom Interactions

Ming Li

Jan 1, 20140 citations

Moment coupling in the interaction of atoms and their ions with a 3d-electron shell

A. V. Kosarim, Борис М. Смирнов, M. Capitelli +1 more

The moment coupling of an interacting ion and an atom with a 3 d -electron shell is analyzed for the ground state of identical atoms and ions where resonant charge exchange proceeds with transition of a 4 s -electron. The interaction of the ion charge with the atom quadrupole moment is important for this system along with the exchange interactions and spin-orbit interactions inside an isolated atom and an ion. The quadrupole moment for 3 d -atoms in the ground states is evaluated. The hierarchy of interactions in a molecular ion is analyzed depending on ion-atom distances and is compared with the standard Hund scheme. The resonant charge exchange proceeds effectively at separations corresponding to an intermediate case between cases “a” and “c” of the Hund coupling scheme.The moment coupling of an interacting ion and an atom with a 3 d -electron shell is analyzed for the ground state of identical atoms and ions where resonant charge exchange proceeds with transition of a 4 s -electron. The interaction of the ion charge with the atom quadrupole moment is important for this system along with the exchange interactions and spin-orbit interactions inside an isolated atom and an ion. The quadrupole moment for 3 d -atoms in the ground states is evaluated. The hierarchy of interactions in a molecular ion is analyzed depending on ion-atom distances and is compared with the standard Hund scheme. The resonant charge exchange proceeds effectively at separations corresponding to an intermediate case between cases “a” and “c” of the Hund coupling scheme.

Journal of Experimental and Theoretical PhysicsSep 1, 20110 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.