Role of potential structure in the collisional excitation of metastable O([sup 1][ital D]) atoms

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.286· OSTI ID:6520836

Padmavathi, D A; Mishra, M K ^[1]; Rabitz, H ^[2]

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1. Department of Chemistry, Indian Institute of Technology, Powai, Bombay 400 076 (India)
2. Department of Chemistry, Princeton University, Princeton, New Jersey 08544 (United States)

This paper considers the collisional excitation of O([sup 1][ital D]) modeled by the crossing of two valence 1 [sup 3][Pi][sub [ital g]] curves dissociating to O([sup 3][ital P])+O([sup 3][ital P]) [[ital V][sub 11]([ital R])] and O([sup 3][ital P])+O([sup 1][ital D]) [[ital V][sub 22]([ital R])] which in turn are further crossed by the [sup 3][Pi][sub g] Rydberg curve dissociating to O([sup 3][ital P])+O([sup 5][ital S]) [[ital V][sub 33]([ital R])]. The role of structure in the potential curves and coupling matrix elements is quantitatively probed by the first-order functional-sensitivity densities [delta] ln[sigma][sub 12]([ital E])/[delta] ln[ital V][sub [ital i][ital j]]([ital R]) of the excitation cross section [sigma][sub 12]([ital E]) obtained from close-coupling calculations. The results reveal that, in spite of the well-separated nature of the crossing between the two valence curves from their crossings with the Rydberg potential curve, the excitation cross section [sigma][sub 12] displays considerable sensitivity to the Rydberg curve [ital V][sub 33]([ital R]) at all energies in the range 3.0--9.0 eV. For relative collisional energies corresponding to the higher closely spaced vibrational energy levels of the Rydberg state, the excitation cross section is found to be much more sensitive to the Rydberg state than to the two valence states themselves.

• OSTI ID: 6520836
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664100* -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
DIAGRAMS
DISSOCIATION
ELEMENTS
ENERGY
ENERGY LEVELS
EXCITED STATES
INTERATOMIC FORCES
METASTABLE STATES
NONMETALS
OXYGEN
POTENTIAL ENERGY
RYDBERG STATES