Journal of Molecular Spectroscopy
               -- July 2000 -- vol.202, no.1, pp. 67-82

High-temperature infrared measurements in the region of the bending
fundamental of H^12/C^14/N, H^12/C^15/N and H^13/C^14/N

Maki, A.G.; Mellau, G.C.; Klee, S.; Winnewisser, M.; Quapp, W.

High-resolution measurements have been made on the infrared emission
spectrum of H^12/C^14/N, H^12/C^15/N, and H^13/C^14/N at temperatures 
of the order of 1370 K. The measurements cover the
region 400-850 cm^-1/ with a resolution of 0.006 cm^-1/. New
room-temperature absorption measurements are also reported for H^13/C^14/N 
in the regions, 1200-1500 cm^-1/ and 2500-3700 cm^-1/.
These measurements are combined with earlier measurements to obtain improved
values for the rovibrational constants for these three isotopomers. The high
temperatures allowed us to measure the bending vibrational levels up to the
0 11^11/ O state, at more than 7900 cm^-1/ above the ground
vibrational level, for H^12/C^15/N, and H^13/C^14/N, and the
0 10^10/ 0 state for H^12/C^14/N. The Coriolis interaction
responsible for the laser transitions of H^12/C^14/N and H^12/C^15/N 
has also been observed, for the first time, for H^13/C^14/N. 
New r_e values are given using the B_e values found in this
paper and in a recent paper on deuterated isotopomers

Doc. Type Journal Paper ; Experimental

Publisher Academic Press  Coden JMOSA3
ISSN 0022-2852

Classification codes A3320E; A3520P; A3370J

Index
hydrogen compounds; infrared spectra; isotope shifts;
rotational-vibrational states;
high-temperature infrared measurements; bending fundamental; 
H^12/C^14/N; H^12/C^15/N; H^13/C^14/N;
high-resolution measurements; infrared emission spectrum; 
room-temperature absorption measurements; rovibrational constants; 
isotopomers; bending vibrational levels; Coriolis interaction; 
laser transitions; 1370 K; 400 to 850 cm^-1/; HCN