Absolute line intensities for oxirane from 1420 to 1560 cm−1

Abstract

Absolute individual line intensities of numerous transitions of the fundamental ν2 and ν10 bands of oxirane (ethylene oxide, cyc-C2H4O) have been measured in the 1420–1560cm−1 region using seven high-resolution Fourier transform spectra recorded at 0.002cm−1 resolution and various pressures. These line intensities were least-squares fit using a theoretical model which takes into account the vibration–rotation interactions linking the upper state rotational levels, and, therefore, accurate rotational expansion of the transition moments of the ν2 and ν10 vibrational bands were derived. Using the coefficients obtained in the fitting, a line list of both bands has been generated. Comparisons with measurements taken at low resolution of the ν2/ν10 dyad system show excellent agreement.