A Analysis of the Digitally Enhanced High Resolution Infrared Spectra of Trideuterated Acetonitrile and Acetonitrile
A signal averaging procedure has been developed to make short segments of digital high resolution infrared grating spectra linear in frequency and to sum the segments in phase. Signal averaging can be used to increase the signal to noise ratio, to increase the resolution limit, or a combination of the two. Combining signal averaging with other signal processing techniques, the resolution limit of the (nu)(,4) band of CD(,3)Br was increased enough to warrant a reanalysis that included an x-y Coriolis interaction. The final resolution limit for the (nu)(,4) band was approximately 0.025 cm(' -1). Signal averaging also increased the "signal strength" of the weakly absorbing 2(nu)(,5) ((PERP)) band of CH(,3)CN enough to analyze it simultaneously with the (nu)(,5) band. Analysis of eighty (80) lines from the 2(nu)(,5)((PERP)) band and one hundred sixty (160) lines from the (nu)(,5) band improved the values of several molecular constants.
- Pub Date:
- SIGNAL AVERAGING;
- WEIGHTING SCHEME;
- Physics: Molecular