Determination of potential energy surfaces of linear triatomics from vibration-rotation spectra: An inversion method applied to CO2
✍ Scribed by Hubert Romanowski; Mark A. Ratner; R.B. Gerber
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 821 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0010-4655
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✦ Synopsis
An inversion procedure for obtaining a local stretching/bending three-mode potential for the CO2 molecule is outlined, and a FORTRAN program for implementing this procedure is presented. The technique is a general one, and should be applicable to any small molecule for which adequate vibration/rotation spectroscopic data are available. The potential surface is obtained in two steps: first, an approximate surface is obtained using the vibrational self-consistent-field scheme to generalize the semiclassical Rydberg-Klein-Rees inversion: this surface is based on approximate inversion method and is unique. Next, a perturbative approach is defined, to obtain an improved surface. While this produces a surface of high accuracy, it is a fitting, rather than an inversion, and may not produce a unique surface. Comments are offered on extension and application of this SCF-based inversion scheme.