10.6084/m9.figshare.1012112.v1
Daniele Toffoli
Piero Decleva
Upper panel: rotationally averaged two-photon cross section of the C 1s orbital of methane
2013
IOP Publishing
C 1
Central panel
light polarizations
carbon monoxide
radiation beam
order perturbation theory
profile
core valence excitations
section
multicentric basis
nuclei approximation
asymmetry parameters
2013-06-13 00:00:00
article
https://iop.figshare.com/articles/_Upper_panel_rotationally_averaged_two_photon_cross_section_of_the_C_1s_orbital_of_methane/1012112
<p><strong>Figure 1.</strong> Upper panel: rotationally averaged two-photon cross section of the C 1s orbital of methane. Central panel: β<sub>2</sub> asymmetry parameter profile. Lower panel: β<sub>4</sub> asymmetry parameter profile.</p> <p><strong>Abstract</strong></p> <p>The two-photon core ionization dynamics of gas-phase methane, carbon monoxide and nitrogen have been studied with a recent implementation of the lowest order perturbation theory in the framework of density functional theory and a multicentric basis set expansion of bound and scattering states. Ionization cross sections and angular asymmetry parameters have been calculated for the case of a single radiation beam and for both linear and circular light polarizations in the fixed nuclei approximation. Expected resonances due to core valence excitations enhance the cross section by several orders of magnitude.</p>