title: Effect of molecular rotation on the atomic alignment dependence in the oriented Ar (3P2) + CF3H reaction.
abstract: Atomic alignment effect for the CF3* formation in the oriented Ar (3P2, MJ = 2) + CF3H reaction has been investigated at different two CF3H beam conditions: effusive and supersonic beams. The chemiluminescence intensity of CF3* was measured as a function of the magnetic orientation field direction in the collision frame. A significant contribution of rank 4 moment was recognized. The cross-section for each magnetic M'(J) substate in the collision frame, sigma|M'(J)|, was determined to be sigma(|M'(J)|=0):sigma(|M'(J)|=1):sigma(|M'(J)|=2) = 1.00:0.84 +/- 0.02:0.88 +/- 0.02 for the effusive CF3H beam condition. The atomic alignment effect was found to significantly depend on the CF3H beam condition. For the supersonic beam condition, sigma(|M'(J)|=0&1) was changed to be smaller than sigma(|M'(J)|=2).
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan.
authors.forename: D
authors.initials: D
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Ohoyama
authors.forename: T
authors.initials: T
authors.lastname: Matsumura
authors.forename: T
authors.initials: T
authors.lastname: Kasai