# ASSIGNMENT OF THE SCHUSTER BAND OF AMMONIA

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 dc.creator Watson, J. K. G. en_US dc.date.accessioned 2006-06-15T14:58:45Z dc.date.available 2006-06-15T14:58:45Z dc.date.issued 1985 en_US dc.identifier 1985-WH-14 en_US dc.identifier.uri http://hdl.handle.net/1811/12314 dc.description $^{1}$A. Schuster, Rep. Brit. Assoc. 38 (1872). $^{2}$H. Sch\""uler, A. Michel, and A.E. Gr\""{u}n, z. Naturforsch. A 10, 1-3 (1955). $^{3}$G. Herzberg, Faraday Discuss. Roy. Soc. Chem. 71, 165-173 (1981). $^{4}$G. Herzberg and J.T. Hougen, J. Mol. Spectrosc. 97, 430-440 (1983). en_US dc.description Author Institution: Herzberg Institute of Astrophysics National Research Council of Canada en_US dc.description.abstract The Schuster band observed in emission from discharges through $ammonia^{1-3}$ is a broad diffuse feature with maxima at 5672 and 5639 {\AA}. The corresponding band from $ND_{3}$ discharges shows resolved rotational $structure^{3,4}$ with a Q head at 5803 {\AA}. It is shown here from its wavenumber, structure and isotope shift that this band can be assigned to the $2^{1}{_{1}}$ band of the electronic transition $\bar{C}^{\prime}{^{1}} A^{\prime}_{1} \rightarrow \bar{A}^{1} A^{\prime\prime}_{2}$ of the ammonia molecule $NH_{3}$. The assignment of this $band^{3,4}$ as a transition of the ammonium radical $NH_{4}$ was mainly based on the occurrence of three intermediate $bands^{2-4}$ for isotopic mixtures of $NH_{3}$ and $ND_{3}$. It appears that one of these bands is an extraneous band of a mixed H-D species that unfortunately produces a very misleading spectrum in isotopic mixtures. en_US dc.format.extent 90513 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title ASSIGNMENT OF THE SCHUSTER BAND OF AMMONIA en_US dc.type article en_US