Submillimeter-wave spectroscopy of HCN in excited vibrational states

Details Submillimeter-wave spectroscopy of HCN in excited vibrational states Submillimeter-wave spectroscopy of HCN in excited vibrational states

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jmosp.220..223z&link_type=abstract

Journal of Molecular Spectroscopy, Volume 220, Issue 2, p. 223-233.

Physics

10

Scientific paper

Measurements of the rotational spectrum of HCN in excited vibrational states have been extended to higher-/J values. The transitions reach /J=8<--7 around 710GHz for most vibrational states studied in this investigation and /J=22<--21 near 2THz for the (020) and (030) vibrational states. Using a pure sample of gaseous HCN at ~350K, selected states up to one quantum in the C-H stretching vibration at 3311.5cm-1 have been investigated. Even transitions having two quanta in the C-H stretch could be studied employing a glow discharge in a gas mixture of CH4 and N2. Molecular constants in 13 vibrational states have been obtained, several of which have been studied for the first time by rotational spectroscopy. The vibrational temperature in the discharge system is found to be about 1500K for the stretching vibrational modes and about 600K for the bending states.

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