DEPENDENCE OF LEVEL-RESOLVED ENERGY-TRANSFER ON INITIAL VIBRATIONAL LEVEL IN LI(2)A(1)SIGMA(-NE COLLISIONS()(U))

Citation
Yx. Gao et al., DEPENDENCE OF LEVEL-RESOLVED ENERGY-TRANSFER ON INITIAL VIBRATIONAL LEVEL IN LI(2)A(1)SIGMA(-NE COLLISIONS()(U)), The Journal of chemical physics, 104(4), 1996, pp. 1415-1426
Citations number
58
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
ISSN journal
00219606
Volume
104
Issue
4
Year of publication
1996
Pages
1415 - 1426
Database
ISI
SICI code
0021-9606(1996)104:4<1415:DOLEOI>2.0.ZU;2-R
Abstract
We have investigated collision induced rotational and vibrational ener gy transfer in the Li(2)A(1) Sigma(u)(+)(v(i), j(i)=30) -Ne system exp erimentally under single-collision conditions at an effective temperat ure of 691 K. Over 800 inelastic rate constants have been measured, wi th the initial vibrational level v(i) ranging from 2 to 24 and -2 less than or equal to Delta v+2. Increasing v(i) results in a linear incre ase in the vibrational transition rate constants, which is accompanied by a decrease in the rotationally inelastic transition rate constant. The total inelastic rate constant increases with upsilon(i) only at t he highest values of vi. Net vibrational energy transfer [Delta E] cal culated using rotationally summed rate constants is qualitatively cons istent with a simple model. However, explicit inclusion of rotation gi ves quite different values of [Delta E]. The experimental results are compared with our three-dimensional trajectory calculations on an ab i nitio potential surface and on a simple repulsive potential surface. ( C) 1996 American Institute of Physics.