# EMISSION HIGH RESOLUTION FOURIER SPECTROSCOPY IN THE INFRA-RED: THE $w^{3}\Delta_{u}$ STATE OF THE $N_{2}$ AND $P_{2}$ MOLECULES

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 Title: EMISSION HIGH RESOLUTION FOURIER SPECTROSCOPY IN THE INFRA-RED: THE $w^{3}\Delta_{u}$ STATE OF THE $N_{2}$ AND $P_{2}$ MOLECULES Creators: Effantin, C.; Bacis, R.; D'Incan, J.; Amiot, C.; Vergès, J. Issue Date: 1978 Publisher: Ohio State University Abstract: Thanks to multiplex arid throughput advantages, the technique of high resolution Fourier spectroscopy is particularly useful in the study of certain non-observed (or not easily observed) excited states through their emission infra-red spectra. This is for instance the case for the $w^{3}\Delta_{u}$ state of the $P_{2}$ and $N_{2}$ molecules. It has been possible to localize and rotationally analyze the unknown (or badly known) states coming from the configuration KKLL $(\sigma_{g}{^{3}}s)^{2} (\sigma_{u}{^{3}}s)^{2} (\Pi_{u}3p)^{3} (\sigma_{g}3p)^{2}(\Pi_{g}3p)$, through the $b^{3}\Pi_{g}- w\quad{^{3}}\Delta_{u}$ emission spectrum. This system is observed in the 2500-4500 $cm^{-1}$ region for the $N_{2}$ molecule (WU-BENESH system) and the related rotational analysis is now in progress. The same system is observed in the $4000-5700\, cm^{-1}$ range for the $P_{2}$ molecule and the rotational analysis leads to the corresponding parameters for the$w^{3}\Delta_{u}$ state. Molecular parameters of the $w^{3}\Delta_{u}$ (v = 0) state of $P_{2}$ (in $cm^{-1}$) and equilibrium constants [FIGURE] The quoted uncertainty is equal to two standard deviations. a) $P=P_{\Delta}+P_{\Delta J}X$ b) $\nu_{\Delta}=0$ C) Estimated valves from the subband P heads. Description: Author Institution: Laboratoire de Spectrom\'{e}trie Ionique et Mol\'{e}culaire, Universite Claude Bernard-Lyon I; Laboratoire de Physique Mol\'{e}culaire et d'Optique Atmosph\'{e}rigue, Universite Claude Bernard-Lyon I; Laboratoire Aim\'{e} Cotton, CNRS II, Universite Claude Bernard-Lyon I URI: http://hdl.handle.net/1811/10560 Other Identifiers: 1978-Sigma-01