Dynamics of oxygen Rydberg atom generation following O 1s inner-shell excitation of H{sub 2}O

Journal Article · Sat Jun 07 00:00:00 EDT 2014 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4880557· OSTI ID:22304231

Ikegami, T.; Honma, K. ^[1]; Takahashi, O. ^[2]; Shigemasa, E. ^[3]; Hikosaka, Y. ^[4]; Tamenori, Y. ^[5]

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1. University of Hyogo, Koto 3-2-1, Kamigori-cho, Ako-gun, Hyogo 678-1297 (Japan)
2. Hiroshima University, 2-2 Kagamiyama 1-chome, Higashihiroshima 739-8512 (Japan)
3. UVSOR Facility, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585 (Japan)
4. Department of Environmental Science, Niigata University, 8050, Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181 (Japan)
5. JASRI, Koto 1-1-1, Sayo-cho, Hyogo 679-5198 (Japan)

The emission of low-energy electrons from H{sub 2}O has been investigated at photon excitation energies in the vicinity of the O 1s ionization threshold. Neutral oxygen Rydberg atoms (O*) were found to form, and the correlation between the initial inner-shell excited state of H{sub 2}O and the Rydberg state of O* was determined. The initially excited electron in a Rydberg orbital is shown to remain associated with O* even after the cleavage of two O-H bonds. We also show that the energy discrepancy between two Rydberg states of H{sub 2}O and O* can be explained by the influence of the post-collision interaction, which becomes stronger as the excitation energy approaches the 1s ionization threshold.

• OSTI ID: 22304231
• Journal Information: Journal of Chemical Physics, Vol. 140, Issue 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ATOMS
CLEAVAGE
COLLISIONS
ELECTRONS
EMISSION
INNER-SHELL EXCITATION
INTERACTIONS
OXYGEN
PHOTONS
RYDBERG STATES
WATER