Document Type
Article
Original Publication Date
1981
Journal/Book/Conference Title
The Journal of Chemical Physics
Volume
74
Issue
11
DOI of Original Publication
10.1063/1.441039
Date of Submission
October 2015
Abstract
The optical–optical double resonance (OODR) technique is used to investigate the change in magnetic quantum number (M) a state selected molecule undergoes on collision with other molecules. A first linearly polarized dye laser prepares A 1Σ+BaO(v = 1) in the J = 1, M = 0 sublevel. The extent of collisional transfer to other M sublevels of both J = 1 and J = 2 is then probed by a second polarized dye laser which induces fluorescence from the C 1Σ+ state. Elastic collisions (ΔJ = 0) between BaO (A 1Σ+) and CO2 are observed to change M from 0 to ±1 leaving J unchanged. The total elasticM‐changing cross section is σΔM CO2 = 8.4±2.4 Å2. Inelastic collisions (ΔJ = +1’ which transfer molecules to j = 2 also cause M changes. with both Ar and CO2 as collision partners. M, the s p a c e‐f i x e d projection of J, is found to be neither conserved nor randomized. Quantum atom–diatom collision models with quantization axis along the relative velocity vector are considered. Transition amplitudes in this system are evaluated using the l‐dominant and CS approximations.
Rights
Silvers, S. J., Gottscho, R. A., & Field, R. W. Collisional depolarization of state selected (J,M J ) BaO A 1Σ+ measured by optical–optical double resonance. The Journal of Chemical Physics, 74, 6000 (1981). Copyright © 1981 American Institute of Physics.
Is Part Of
VCU Chemistry Publications
Comments
Originally published at http://dx.doi.org/10.1063/1.441039