Channel Closing in Multiphoton Ionization of Mg

Author

J. Greg Story, Missouri University of Science and TechnologyFollow
D. I. Duncan
Thomas F. Gallagher

Abstract

Experimental data are presented showing the channel closing of four-photon ionization of Mg. It is shown that, for circularly polarized light, the ionization versus intensity spectra exhibit sharp breaks from the normal I⁴ intensity dependence at the critical intensity where the channel closing occurs. Above the critical intensity, the population of Rydberg states which survives the laser pulse is observed. The residual Rydberg population is found to be greatly reduced for linearly polarized light due to the relatively large probability of ionization of the low-angular-momentum Rydberg states. The data are in good agreement with a model which includes averaging over the spatial profile of the laser.

Recommended Citation

J. G. Story et al., "Channel Closing in Multiphoton Ionization of Mg," Physical Review A, vol. 49, no. 5, pp. 3875 - 3880, American Physical Society (APS), May 1994.

The definitive version is available at https://doi.org/10.1103/PhysRevA.49.3875

Department(s)

Physics

International Standard Serial Number (ISSN)

1050-2947

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1994 American Physical Society (APS), All rights reserved.

Publication Date

01 May 1994