Interaction of Rydberg atoms in circular states with the alkaline-earth Ca(4s{sup 2}) and Sr(5s{sup 2}) atoms
The resonant mechanism of interaction of alkaline-earth atoms having a low electron affinity to Rydberg atoms in circular (l = vertical bar m vertical bar = n–1) and near-circular states has been studied. To describe the dynamics of resonant processes accompanied by nonadiabatic transitions between ionic and Rydberg covalent terms of a quasimolecule, an approach based on the integration of coupled equations for the probability amplitudes has been developed taking into account the possibility of the decay of an anion in the Coulomb field of the positive ionic core of a highly excited atom. The approach involves the specific features of the problem associated with the structure of the wavefunction of a Rydberg electron in states with high orbital angular momenta l ∼ n–1. This approach provides a much more accurate description of the dynamics of electronic transitions at collisions between atoms than that within the modified semiclassical Landau–Zener model. In addition, this approach makes it possible to effectively take into account many channels of the problem. The cross sections for resonant quenching of Rydberg states of the Li(nlm) atom with given principal n, orbital l = n–1, and magnetic m quantum numbers at thermal collisions with the Ca(4s{sup 2})more »
- Publication Date:
- OSTI Identifier:
- 22472002
- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 121; Journal Issue: 5; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; ANIONS; ATOMS; COMPARATIVE EVALUATIONS; COULOMB FIELD; COVALENCE; CROSS SECTIONS; ELECTRONS; LANDAU-ZENER FORMULA; NEUTRAL PARTICLES; ORBITAL ANGULAR MOMENTUM; PERTURBATION THEORY; QUANTUM NUMBERS; RYDBERG STATES; SEMICLASSICAL APPROXIMATION; WAVE FUNCTIONS