Transfer of a weakly bound electron in collisions of Rydberg atoms with neutral particles. II. Ion-pair formation and resonant quenching of the Rb(nl) and Ne(nl) States by Ca, Sr, and Ba atoms

Нариц, А. А.; Mironchuk, E. S.; Лебедев, В. С.

doi:10.1134/s1063776113100051

Cited by 4 publications

(1 citation statement)

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“…The physical explanation of this phenomenon was given by [24] and has been recently studied in detail in [25][26][27][28][29]. We now recall the main results.…”

Section: Formation Via Rydberg Charge Exchangementioning

confidence: 79%

Universal deceleration of highly polar molecules

et al. 2015

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We propose a method to produce, in a pulsed or continuous way, cold samples of highly polar molecules. Using a pulsed or continuous standard (supersonic) beam of these molecules, our idea consists of transforming the molecules into their anionic counterparts, which are decelerated to a standstill by a well-controlled external electric field and ultimately neutralized. The neutral-to-anion transformation occurs through collisions with Rydberg atoms coming from an additional atomic beam. This Rydberg electron transfer process is possible provided that the molecular species has a sufficiently strong electric dipole (>2.5 D, i.e., > × − 8.3 10 30 cm). Whatever the mass of the species, the deceleration stage is realized by a temporally and spatially controlled electric field within a range of less than one centimeter, which is much shorter than in current deceleration experiments of neutral molecules. Once stopped, the molecular anions are neutralized by laser photodetachment or a pulsed electric field process. The resulting molecules might be held and accumulated, for instance, in a magnetic trap.

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“…The physical explanation of this phenomenon was given by [24] and has been recently studied in detail in [25][26][27][28][29]. We now recall the main results.…”

Section: Formation Via Rydberg Charge Exchangementioning

confidence: 79%

Universal deceleration of highly polar molecules

et al. 2015

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Resonant quenching of Rydberg atomic states by highly polar molecules

Нариц

Mironchuk

Лебедев

2016

J. Phys. B: At. Mol. Opt. Phys.

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The results of theoretical studies of the resonant quenching and ion-pair formation processes induced by collisions of Rydberg atoms with highly polar molecules possessing small electron affinities are reported. We elaborate an approach for describing collisional dynamics of both processes and demonstrate the predominant role of resonant quenching channel of reaction for the destruction of Rydberg states by electron-attaching molecules. The approach is based on the solution of the coupled differential equations for the transition amplitudes between the ionic and Rydberg covalent terms of a quasimolecule formed during a collision of particles. It takes into account the possibility of the dipole-bound anion decay in the Coulomb field of the positive ionic core and generalizes previous models of charge-transfer processes involving Rydberg atoms to the cases, when the multistate Landau-Zener approaches become inapplicable. Our calculations for ( ) nl Rb atom perturbed by C H SO 2 4 3 , CH CHCN 2 , CH NO 3 2 , CH CN 3 , C H O 3 2 3 , and C H O 3 4 3molecules show that the curves representing the dependence of the resonant quenching cross sections on the principal quantum number n are bell-shaped with the positions of maxima being shifted towards lower values of n and the peak values, ( ) s max q , several times higher than those for the ion-pair formation, ( ) s max i . We obtain a simple power relation between the energy of electron affinity of a molecule and the position of maximum in n-dependence of the resonant quenching cross section. It can be used as an additional means for determining small binding energies of dipole-bound anions from the experimental data on resonant quenching of Rydberg states by highly polar molecules.

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