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Diode Laser Spectrum of HCCCN near 5 tun * The Hot Band

Koichi Yamada and Gisbert Winnewisser
I. Physikalisches Institut, Universität zu Köln
Z. Naturforsch. S6a, 23—29 (1981);

[received November 26, 1980]

Two hot bands associated with the vs vibration-rotation band of cyanoaoetylene, HC3N, have been measured with a diode laser spectrometer in the 2060—2100 cm-1 range. Since the width of the observed lines is essentially determined by Doppler broadening, the splitting of the hot band rovibrational transitions due to /-type doubling could be resolved and was assigned. Improved spectral parameters were obtained, including the anharmonicity parameters.

Introduction