Angularly resolved rotational energy transfer in highly vibrationally excited states: Na sub 2 ( v =31)--Ne

Journal Article · Fri Mar 15 04:00:00 EST 1991 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.460611· OSTI ID:5909817

Ziegler, G; Kumar, S V.K.; Rubahn, H; Kuhn, A; Sun, B; Bergmann, K ^[1]

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1. Fachbereich Physik, Universitaet Kaiserslautern, D-6750 Kaiserslautern, Germany (DE)

The scattering of high vibrationally excited sodium molecules Na{sub 2}({ital v}=31) with Ne atoms at 180 meV collision energy is investigated in a crossed molecular beam arrangement using laser optical methods. Angularly resolved rotationally inelastic and vibrationally elastic cross sections {ital j}{sub {ital i}}{r arrow}{ital j}{sub {ital f}} are measured for {ital j}{sub {ital i}} =5, 7, and 9{le}{ital j}{sub {ital f}} {le}25. Pronounced rotational rainbow maxima are observed, the angular position of which indicates a significantly larger anisotropy of the interaction potential compared to that of Na{sub 2}({ital v}=0)--Ne. Except for the increase of the anisotropy the vibrational excitation has little effect on the dynamics of rotational energy transfer. Good agreement with a new semiempirical Na{sub 2}--Ne potential surface {ital V}({ital r},{ital R},{gamma}) is found.

• OSTI ID: 5909817
• Journal Information: Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 94:6; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ANGULAR DISTRIBUTION
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
BEAMS
COLLISIONS
CROSS SECTIONS
DIMERS
DISTRIBUTION
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY TRANSFER
EV RANGE
EXCITED STATES
FLUIDS
GASES
METALS
MILLI EV RANGE
MOLECULAR BEAMS
MOLECULE COLLISIONS
NEON
NONMETALS
RARE GASES
ROTATIONAL STATES
SODIUM
VIBRATIONAL STATES