Inelastic and quasielastic collisions of Rydberg atoms with the heavy rare-gas atoms
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0111 (United States)
A theory of inelastic {ital n},{ital l}-changing and quasielastic {ital l}-mixing collisions of Rydberg atoms with the heavy rare-gas atoms is developed. It is based on the semiclassical impact-parameter approach combined with the normalized perturbation theory. Semiclassical formulas for scaled transition probabilities and cross sections as functions of the inelasticity parameter and the collision strength are analyzed. This approach gives a general description of collisional {ital nl}{r_arrow}{ital n}{sup {prime}} transitions independently of the specific values of the principal quantum number, the relative velocity, and the type of colliding atoms. The energy and angular dependence of the electron-atom scattering amplitude is included in the theory by incorporating the impulse-approximation results in the weak-coupling limit. The Ramsauer-Townsend effect affects significantly the values of the cross sections, especially for the inelastic transitions with large energy transfer. The results obtained are used in calculations of the quenching cross sections for the Rb({ital nS},{ital nD},{ital nF}) atoms in collisions with Ar, Kr, and Xe. Comparison of theory and experiment is made in a wide range of the principal quantum numbers and transition energy defects. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 387541
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 54; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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