Correlated Keldysh-Faisal-Reiss theory of above-threshold double ionization of He in intense laser fields
Creators
- 1. Fakultaet fuer Physik, Universitaet Bielefeld, D-33501 Bielefeld (Germany)
Description
We have developed a correlated Keldysh-Faisal-Reiss theory of laser-induced double ionization of a two-electron atom. The basic N-photon T matrix and the expression for N-photon triple-differential rates or cross sections (TDCS's) are derived. The theory is applied to investigate the TDCS's for very-high-order multiphoton double ionization of He with lasers of wavelength λ=248 nm and λ=617 nm. Comparison with the uncorrelated results reveals a dramatic influence of the final-state e-e correlation on the above-threshold TDCS's to be measured in coincidence experiments in intense laser fields. The limiting case of the TDCS's for weak-field double ionization of He by a synchrotron photon is also investigated; the results confirm the earlier theoretical findings and recent experimental results in that case
Additional details
Publishing Information
- Journal Title
- Physical Review. A
- Journal Volume
- 50
- Journal Issue
- 4
- Journal Page Range
- p. 3256-3264.
- ISSN
- 1050-2947
- CODEN
- PLRAAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 26013464
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS;
- Descriptors DEI
- CHARGE STATES; DIFFERENTIAL CROSS SECTIONS; HELIUM; LASER RADIATION; MULTI-PHOTON PROCESSES; PHOTOIONIZATION; POWER DENSITY; S MATRIX; THRESHOLD ENERGY
- Descriptors DEC
- CROSS SECTIONS; ELECTROMAGNETIC RADIATION; ELEMENTS; ENERGY; IONIZATION; MATRICES; NONMETALS; RADIATIONS; RARE GASES