# Radiative Quenching and Excitation of Metastable States upon Differential Scattering of Atoms: I. Uniform Quasi-Classical Theory

## Abstract

A theory of radiative-collisional transitions between the ground and metastable {sup 1}S states of a colliding atom is proposed. The theory uses the uniform quasi-classical approximation generalized to the case of spherically asymmetric interactions. The theory takes into account the angular momentum of an emitted (absorbed) photon and allows one to calculate the total and differential scattering cross sections in a wide range of radiation frequencies including both wings and the center of the line of a forbidden atomic transition. The range of admissible collision energies and intensities of an external radiation field is restricted by the use of the adiabatic approximation, as well as the approximation of a weak coupling between the ground and excited states of a quasi-molecule, the potentials of which are assumed to be monotonically repulsive.

- Authors:

- Institute of Physics, St. Petersburg State University, Peterhof, St. Petersburg, 198904 (Russian Federation)

- Publication Date:

- OSTI Identifier:
- 20723278

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Optics and Spectroscopy; Journal Volume: 99; Journal Issue: 6; Other Information: Translated from Optika i Spektroskopiya , ISSN 0030-4034, 99, 894-902 (No. 6, 2005); DOI: 10.1134/1.2149408; (c) 2005 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); TN:

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; ADIABATIC APPROXIMATION; ANGULAR MOMENTUM; ASYMMETRY; ATOM-ATOM COLLISIONS; ATOMIC BEAMS; ATOMS; EXCITATION; GROUND STATES; METASTABLE STATES; PHOTON-ATOM COLLISIONS; PHOTONS; POTENTIAL ENERGY; QUENCHING; SCATTERING

### Citation Formats

```
Devdariani, A.Z., and Chesnokov, E.A.
```*Radiative Quenching and Excitation of Metastable States upon Differential Scattering of Atoms: I. Uniform Quasi-Classical Theory*. United States: N. p., 2005.
Web. doi:10.1134/1.2149408.

```
Devdariani, A.Z., & Chesnokov, E.A.
```*Radiative Quenching and Excitation of Metastable States upon Differential Scattering of Atoms: I. Uniform Quasi-Classical Theory*. United States. doi:10.1134/1.2149408.

```
Devdariani, A.Z., and Chesnokov, E.A. Thu .
"Radiative Quenching and Excitation of Metastable States upon Differential Scattering of Atoms: I. Uniform Quasi-Classical Theory". United States.
doi:10.1134/1.2149408.
```

```
@article{osti_20723278,
```

title = {Radiative Quenching and Excitation of Metastable States upon Differential Scattering of Atoms: I. Uniform Quasi-Classical Theory},

author = {Devdariani, A.Z. and Chesnokov, E.A.},

abstractNote = {A theory of radiative-collisional transitions between the ground and metastable {sup 1}S states of a colliding atom is proposed. The theory uses the uniform quasi-classical approximation generalized to the case of spherically asymmetric interactions. The theory takes into account the angular momentum of an emitted (absorbed) photon and allows one to calculate the total and differential scattering cross sections in a wide range of radiation frequencies including both wings and the center of the line of a forbidden atomic transition. The range of admissible collision energies and intensities of an external radiation field is restricted by the use of the adiabatic approximation, as well as the approximation of a weak coupling between the ground and excited states of a quasi-molecule, the potentials of which are assumed to be monotonically repulsive.},

doi = {10.1134/1.2149408},

journal = {Optics and Spectroscopy},

number = 6,

volume = 99,

place = {United States},

year = {Thu Dec 15 00:00:00 EST 2005},

month = {Thu Dec 15 00:00:00 EST 2005}

}