Transfer of electronic excitation in collisions of metastable argon atoms with nitrogen molecules

Journal Article · Sat Mar 31 23:00:00 EST 1979 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.437904· OSTI ID:6467686

Cutshall, E R; Muschlitz, Jr, E E

Measurements have been made of the product vibrational and rotational state distributions for the process Ar/sup asterisk/(/sup 3/P/sub 2,0/)+N/sub 2/(X) ..-->..Ar(/sup 1/S/sub 0/)+N/sub 2//sup asterisk/(C,/sup 3/Pi/sub u/) by spectrometric observation of the C..-->..B fluorescence at the intersection of supersonic beams of the reactant species over the relative kinetic energy range 0.06--0.41 eV. The results are compared with the predictions of a ''golden rule'' model which gives the transition probabilities in the highly impulsive limit as the product of Franck--Condon and density of states factors. Below 0.17 eV, the model fits the experimentally determined v'=0/v'=1 population ratio reasonably well. At higher energies the experimental ratio rises, however, and reaches a maximum at 0.3 eV. A statistical population of rotational levels for v'=0 corresponding to rotational temperatures of 1300 /sup 0/K and 1100 /sup 0/K at 0.161 and 0.089 eV relative energy, respectively, is observed, while the ''golden rule'' predicts considerably higher rotational excitation in each case.

• Research Organization: Department of Chemistry, University of Florida, Gainesville, Florida 32611
• OSTI ID: 6467686
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 70:7; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CRYOGENIC FLUIDS
DATA
DATA FORMS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EXCITATION
EXCITED STATES
EXPERIMENTAL DATA
FLUIDS
FRANCK-CONDON PRINCIPLE
INFORMATION
ISOLATED VALUES
METASTABLE STATES
MILLI EV RANGE
MOLECULE COLLISIONS
NITROGEN
NONMETALS
NUMERICAL DATA
RARE GASES
ROTATIONAL STATES
VIBRATIONAL STATES