dc.creator Muenchausen, R. E. en_US dc.creator Hills, G. W. en_US dc.date.accessioned 2006-06-15T14:50:53Z dc.date.available 2006-06-15T14:50:53Z dc.date.issued 1983 en_US dc.identifier 1983-TF-09 en_US dc.identifier.uri http://hdl.handle.net/1811/11992 dc.description Author Institution: Department of Chemistry, 27514 University of North Carolina Chapel en_US dc.description.abstract This preliminary work demonstrates the utility of the infra red optical double resonance technique (IODR) in the investigation of the optical absorption spectrum of $ND_{2}$ in the region $5400-6250 {\AA}$. A $CO_{2}$ gas infra red laser pumped ortho rotational transitions within $\tilde{X}^{2}B_{1}, 5_{05}-5_{14}, F_{1}-F_{1}$ and $2_{12}-2_{21}, F_{2}-F_{2}$ in the $\nu_{2}$ band using the $^{12}C^{18} O_{2}P(10)$ line at $1076.578 cm^{-1}$ and $^{12}C^{16}O_{2} R(26)$ line at $1082.302cm^{-1}$ respectively. A counter-propagating CW dye laser was tuned through bands of the $\tilde{A}^{2}A_{1}\leftarrow\tilde{X}^{2}B_{1}$, visible system and the IODR signals were detected as changes in the fluorescence at the IR chopping Frequency. IODR signals corresponding to decreases in fluorescence were observed for optical transitions from both directly pumped (3-level) and collisionally linked (4-level) ortho rotational levels in $\tilde{X} (0,0,0)$. Increased fluoresence IODR signals were also observed in both 3-and 4- level schemes for optical transitions involving ortho rotational levels in $\tilde{X} (0,1,0)$. In addition to simplification of the optical spectrum, which facilitates assignments, observation of IODR signals was used to investigate a perturbation involving the $1_{11}\Pi (0,12,0)$ level by accurately locating the perturbing level. This study illustrates how the specificity of the IODR technique, in selecting a particular rotational level within a dense manifold of levels, can be utilized. $^{*}$Research supported by the National Science Foundation under grant CHE-8111131 en_US dc.format.extent 125126 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title INFRA RED OPTICAL DOUBLE RESONANCE SPECIROSCOPY OF $ND_{2}*$ en_US dc.type article en_US
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