Core-hole excited states of H2O : symmetries and relative oscillator strengths

Tunable and polarized soft x-ray radiation was used to excite core electrons of H2O. Angle-resolved proton yields were measured by retarding potential analyzers at 0° and 90° with respect to the polarization vector of the radiation. The ability of angle-resolved detection to reveal hidden resonances...

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Bibliographic Details
Published in:The Journal of chemical physics 1992-10, Vol.97 (8), p.5915-5918
Main Authors: KIM, D. Y, LEE, K, MA, C. I, MAHALINGAM, M, HANSON, D. M, HULBERT, S. L
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Intensities and shapes of molecular spectral lines and bands
Molecular properties and interactions with photons
Physics
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Summary:Tunable and polarized soft x-ray radiation was used to excite core electrons of H2O. Angle-resolved proton yields were measured by retarding potential analyzers at 0° and 90° with respect to the polarization vector of the radiation. The ability of angle-resolved detection to reveal hidden resonances in rich molecular spectra is demonstrated, and the anisotropy parameter obtained from the two ion yields identifies the symmetries and the relative oscillator strengths of the core-hole excited states in the near-edge region of the spectrum. The analysis of the data substantiates the validity of the axial recoil approximation and provides evidence for ultrafast dissociation. Comparisons with the results of theoretical calculations are made.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.463985