Vibrationally resolved partial cross sections and asymmetry parameters for nitrogen K-shell photoionization of the N{sub 2}O molecule

Journal Article · Sun Jul 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.012506· OSTI ID:21011210

Lucchese, R R; Soederstroem, J; Tanaka, T; Hoshino, M; Kitajima, M; Tanaka, H; De Fanis, A; Rubensson, J -E; Ueda, K ^[1]

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1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan) and Department of Chemistry, Texas A and M University, College Station, Texas 77843-3255 (United States)

We have measured the vibrationally resolved partial cross sections {sigma}{sub (v{sub 1}{sup '},v{sub 2}{sup '},v{sub 3}{sup '})} and asymmetry parameters {beta}{sub (v{sub 1}{sup '},v{sub 2}{sup '},v{sub 3}{sup '})} for N{sub c} and N{sub t} K-shell photoionization of the N{sub 2}O molecule in the {sigma}{sup *} shape resonance region above the N{sub t} and N{sub c} K-shell ionization thresholds. N{sub c} K-shell photoionization of the N{sub 2}O molecule predominantly causes the excitation of the quasisymmetric vibrations (v{sub 1}{sup '}), whereas N{sub t} K-shell photoionization causes both quasisymmetric and quasiantisymmetric vibrations (v{sub 1}{sup '} and v{sub 3}{sup '}) to be excited. The shape resonance energy in the N{sub c} K-shell photoionization increases with an increase in v{sub 1}{sup '}. The {beta}{sub (v{sub 1}{sup '},0,0)} curves for the N{sub c} K-shell photoionization exhibit maxima at energies close to the shape resonance energies for the individual values of v{sub 1}{sup '}. The shape resonance energy in the N{sub t} K-shell photoionization decreases with an increase in v{sub 1}{sup '} and slightly increases with an increase in v{sub 3}{sup '}. The {beta}{sub (v{sub 1}{sup '},0,0)} curves show a significant state dependence in the region of the shape resonance, with the curves shifting to lower energy as v{sub 1}{sup '} increases. The vibrational state dependence of the cross sections {sigma}{sub (v{sub 1}{sup '},v{sub 2}{sup '},v{sub 3}{sup '})} and asymmetry parameters {beta}{sub (v{sub 1}{sup '},v{sub 2}{sup '},v{sub 3}{sup '})} are well reproduced by the theoretical calculations using the multichannel Schwinger configuration interaction (MCSCI) method, including both the N{sub c} and N{sub t} ion states.

• OSTI ID: 21011210
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
CONFIGURATION INTERACTION
CROSS SECTIONS
DIAGRAMS
EXCITATION
IONS
K SHELL
MOLECULES
NITROGEN
NITROUS OXIDE
PHOTOIONIZATION
PHOTON-MOLECULE COLLISIONS
RESONANCE
SIGMA MINUS PARTICLES
VIBRATIONAL STATES