Coulomb-corrected strong-field approximation for the two-electron atom

Journal Article · Tue Apr 01 00:00:00 EST 1997 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.55.3261· OSTI ID:530945

Bauer, J ^[1]

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1. Centrum Fizyki Teoretycznej PAN, Al. Lotnikow 32/46, 02-668 Warsaw (Poland)

We present the model accounting for the Coulomb effects that occur in the direct double photoionization of the two-electron atom in an intense field of a circularly polarized plane wave. The model is the strong-field approximation (SFA) (the Reiss version of Keldysh-type models) applied to helium. We improve here our earlier study by inserting the electron-electron correlation in the initial state of the atom, and by inserting the Coulomb correction due to the influence of the nucleus on the final state of ionized electrons` pair. While the former improvement is of little significance, the latter extends the applicability range of the SFA (for typical laser wavelengths), and causes appreciable growth of the total ionization rate. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 530945
• Journal Information: Physical Review A, Vol. 55, Issue 4; Other Information: PBD: Apr 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
HELIUM
PHOTOIONIZATION
ELECTRON-ELECTRON INTERACTIONS
PHOTON-ATOM COLLISIONS
MULTI-PHOTON PROCESSES
ELECTRON CORRELATION
COULOMB CORRECTION