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- W19740322 abstract "An account is given of recent theoretical studies of partial-channel photoionization cross sections in diatomic and polyatomic molecules employing separated-channel static-exchange calculations and Stieltjes-Tchebycheff moment-theory techniques. The calculated cross sections, which refer to production of specific parent molecular-ionic states upon removal of electrons from individual orbitals, are compared with the results of photoabsorption, electron-impact-excitation, fluorescence-production, photoelectron spectroscopy, and dipole (e, 2e) measurements. Various structures in the calculated and measured partial-channel cross sections as functions of incident photon energy are identified as having either atomiclike or molecularlike origins. Specifically, o-orbital cross sections in light diatomic and polyatomic molecules are found to be generally dominated by strong α — α* photoionization resonances of molecularlike origin, whereas π-orbital cross sections in such molecules exhibit distinctly 2p → kd atomiclike features. These aspects of molecular photoionization are illustrated by detailed theoretical studies of partial-channel cross sections in CO, CO2, and H2CO, the results of which are in generally good accord with corresponding measured values." @default.
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- W19740322 date "1980-01-01" @default.
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- W19740322 title "Theoretical studies of partial-channel photoionization cross sections in diatomic and polyatomic molecules" @default.
- W19740322 doi "https://doi.org/10.1051/jcp/1980770589" @default.
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