A high-resolution study of the OH-stretch fundamental of methanol

The OH-stretch fundamental of CH3OH has been observed with 0.025 cm-1 resolution between 3430 and 3940 cm-1 and the resulting spectrum deconvoluted using the procedure of P. A. Jansson. Approximately 600 lines have been assigned to a total of 67 P- or R-branch series and some 30 excited state levels have been determined. Of these, 14 belong to the lowest torsional state with n = 0, 13 to N = 1 and 3 to N = 2. A nonlinear least-squares fit to these levels varying the major parameters used by Y. Y. Kwan and D. M. Dennison in their analysis of the normal state produces an rms deviation between observed and calculated levels of 0.51 cm-1. Variation of all the parameters including those of the smaller Kirtman perturbation terms produces only a slight improvement in the fit. Both analyses yield a barrier height of 411 cm-1 in the excited vibrational state as compared to the normal state value of 373 cm-1. A number of unexplained anomalies appear in the spectra including large and irregular changes in the coefficient of J2 + J for different torsion-rotation states.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/22170/1/0000601.pd

Prism Spectroscopy between 15 and 25 Microns

Author Institution: National Bureau of StandardsPresentations without an abstract printed in the proceedings do not have an abstract (image or text) in the Knowledge Bank record

The Infrared Absorption Spectra of Substituted Methanes

Author Institution: National Bureau of StandardsPresentations without an abstract printed in the proceedings do not have an abstract (image or text) in the Knowledge Bank record

Mesures dans l'infrarouge avec un prisme en iodure de césium

Pas de Résumé disponibl

A GRATING SPECTROMETER OF HIGH RESOLUTION

Author Institution: National Bureau of Standards“A grating spectrometer has been designed for high resolution from the visible region to 5 microns. By using 8 inch gratings of 10,000 1/in. and 15,000 1/in. double pass, a resolution of $0.03 cm^{-1}$ or better is achieved. Some of the bands of $NH_{3}$ and $CH_{4}$ have been measured and illustrations of the results will be given.

Wavelengths for Calibration of Prism Spectrometers from 2/mu2/mu to 25/mu25/mu

Author Institution: Department of Physics, University of MichiganPresentations without an abstract printed in the proceedings do not have an abstract (image or text) in the Knowledge Bank record