10.6084/m9.figshare.1012113.v1
Daniele Toffoli
Piero Decleva
Two-photon differential cross section of the C 1s ionization of CH<sub>4</sub> for an incident photon energy of 260 eV
2013
IOP Publishing
C 1
light polarizations
carbon monoxide
ionization
radiation beam
core valence excitations
order perturbation theory
section
incident photon energy
CH 4
multicentric basis
nuclei approximation
asymmetry parameters
2013-06-13 00:00:00
article
https://iop.figshare.com/articles/_Two_photon_differential_cross_section_of_the_C_1s_ionization_of_CH_sub_4_sub_for_an_incident_photon/1012113
<p><strong>Figure 2.</strong> Two-photon differential cross section of the C 1s ionization of CH<sub>4</sub> for an incident photon energy of 260 eV.</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>