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Nonresonant Cross-Section, Fano-Shape Parameter and Correlation Coefficient for the Photoionization of 2s2p (1Po) in Heliumlike

The nonresonant cross-section, Fano-shape parameter q and coe?cient parameter ?2 have been calculated for the photoionization of helium and heliumlike under the n =?2 threshold of the residual ions. Dipole matrix elements which correspond to the transitions from 1s2(1Se) to 2(0, 1)+2 1P0?state and from 2(0, 1)+2 state to continuum state 1sep(1P0) were determined by choosing, for the ground state, the six-parameter Hylleraas wave function including electron correlation e?ects and a completely screened Coulomb wave function for the continuum. Energies and widths have been determined in the diagonalization method. The results are compared with available results obtained by other theoretical approaches.

Auteur(s) : Aliou Niane, Ndeye Arame Boye Faye, Ababacar Sadikhe Ndao, and Almamy Konte
Pages : 696382, 6 pages
Année de publication : 2011
Revue : Journal of Atomic, Molecular, and Optical Physics
N° de volume : 2011
Type : Article
Statut Editorial : Journal of Atomic and Molecular Physics is a peer-reviewed, open access journal that publishes original research articles as well as review articles in all areas of atomic and molecular physics.
Mise en ligne par : NDAO Ababacar Sadikhe