A number of CH3CN ground state rotational transitions from 0.5 to 1.5 THz have been accurately measured by means of a CO2 laser difference frequency spectrometer. The measurements are one order of magnitude more accurate than the previous FTS measurements and cover a larger range than the previous high-resolution submillimeter FIR studies. The measurements up to J = 80 with an accuracy ranging between 5 × 10−8 and 2 × 10−7 have led to an improvement in the molecular constants, especially the high-order terms.
Tunable FIR spectroscopy of CH3CN between 569 GHz and 1.48 THz / F.S. Pavone;L.R. Zink;M. Prevedelli;M. Inguscio;L. Fusina. - In: JOURNAL OF MOLECULAR SPECTROSCOPY. - ISSN 0022-2852. - STAMPA. - 144:(1990), pp. 45-50. [10.1016/0022-2852(90)90307-C]
Tunable FIR spectroscopy of CH3CN between 569 GHz and 1.48 THz
PAVONE, FRANCESCO SAVERIO;PREVEDELLI, MARCO;INGUSCIO, MASSIMO;
1990
Abstract
A number of CH3CN ground state rotational transitions from 0.5 to 1.5 THz have been accurately measured by means of a CO2 laser difference frequency spectrometer. The measurements are one order of magnitude more accurate than the previous FTS measurements and cover a larger range than the previous high-resolution submillimeter FIR studies. The measurements up to J = 80 with an accuracy ranging between 5 × 10−8 and 2 × 10−7 have led to an improvement in the molecular constants, especially the high-order terms.
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