The cross sections for the emission of Lyman-α fluorescence in the photoexcitation of H2O have been measured as a function of the incident photon energy in the 14-60 eV range, i.e. the outer-and inner-valence ranges. Four superexcited states have been found, two of which are doubly excited states, one is a singly excited state and one a state including electron configurations of both single and double excitations. The gross feature of the superexcited states of H2O resulting in the formation of excited hydrogen atoms has been obtained by combining the present results and the cross section curves of the Balmer fluorescences (Kato et al 2004 J. Phys. B: At. Mol. Opt. Phys. 37 3127). The breakdown of the independent electron model has been indicated in the inner-valence range of H2O, and the degree of breakdown has been compared among CH4, NH3 and H 2O ten-electron molecules.
|Journal||Journal of Physics B: Atomic, Molecular and Optical Physics|
|Publication status||Published - 2010 Nov 14|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics