A relativistic CI calculation for a two-photon non-resonant transition on O III

Autor:	P Marketos, I Zambetaki
Rok vydání:	1993
Předmět:	Physics Doubly ionized oxygen Ab initio Configuration interaction Atomic physics Condensed Matter Physics Relativistic quantum chemistry Wave function Omega Atomic and Molecular Physics and Optics Ion Gauge fixing
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 26:L249-L254
ISSN:	1361-6455 0953-4075
DOI:	10.1088/0953-4075/26/9/001
Popis:	Wavefunctions obtained with the relativistic CI method are used to determine in a fully ab initio manner, the electronic part of a two-photon non-resonant transition between the Is22s22p2 3P0 and ls22p4 3P2 even levels of O III. The levels ls22s2p3 (3Dl, 3Pl, 3Sl, 1Pl), ls22s22p3s (3Pl lPl), and ls22s22p3d (3Dl, 3Pl, 1Pl) J=1 have been used in the truncated summation method. The photon field is expanded in terms of multipoles and matrix elements in the Coulomb gauge depend negligibly on the omega values of the beams involved in the transition. Results reported may be used in the calculation of two-photon absorption cross sections thus demonstrating the relevance of the relativistic CI method in laser-assisted spectroscopic studies of atoms and ions.
Databáze:	OpenAIRE
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