LOCALIZED PERTURBATION IN THE GROUND VIBRATIONAL-STATE OF O-18 SUBSTITUTED METHANOL

In this note, we report a localized perturbation in the vibrational gr ound state of O-18 substituted methanol as found from the analysis of the high resolution Fourier transform far infrared (FTIR) spectrum. In the course of detailed assignment work on the spectrum an interesting localized perturbation was observed around J=19 levels of (n tau K)=( 019) state. This perturbation was seen to arise from an interaction wi th the (n tau K)=(125) state. The perturbation has been characterized by means of a simple two level approach. The interaction constant was found to be equal to what was obtained for C-13 substituted methanol. (C) 1998 Elsevier Science B.V. All rights reserved.