Direct Rotational Population Distributions Of N[sub]2[/sub] And N[sub]2[/sub]+ In Pulsed Supersonic Beams

A. P. Baronavski; H. Helvajian; B. M. DeKoven

doi:10.1117/12.943100

28 June 1984 Direct Rotational Population Distributions Of N₂ And N₂+ In Pulsed Supersonic Beams

A. P. Baronavski, H. Helvajian, B. M. DeKoven

Proceedings Volume 0482, Applications of Laser Chemistry & Diagnostics; (1984) https://doi.org/10.1117/12.943100
Event: 1984 Technical Symposium East, 1984, Arlington, United States

Abstract

Rotational population measurements have been made on nitrogen neutrals and nitrogen ions in a pulsed supersonic expansion. The ions were produced by electron impact of the neutrals under conditions identical to those used for measurements of the neutrals. For nitrogen neutrals, two-photon laser induced fluorescence on the a--X transition was used to determine distributions, while single photon laser induced fluorescence on the well known B-X transition was used for the ions. This is the first example of the use of two-photon LIF for the detection and monitoring of N₂ in a supersonic beam. Our data on the ion is compared to data in the literature for both the X and B states as well as populations calculated from our neutral data using the dipole model and the dipole plus 9 quadrupole interactions model. Details of these comparisons will be discussed.

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A. P. Baronavski, H. Helvajian, and B. M. DeKoven "Direct Rotational Population Distributions Of N₂ And N₂+ In Pulsed Supersonic Beams", Proc. SPIE 0482, Applications of Laser Chemistry & Diagnostics, (28 June 1984); https://doi.org/10.1117/12.943100

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