Global frequency and intensity analysis of the ν10/ν7/ν4/ν12 band system of 12C2H4 at 10 μm using the D2h Top Data System. (October 2016) - Alkadrou, A.
Abstract: A global frequency and intensity analysis of the infrared tetrad of 12 C2 H4 located in the 600 – 1500 cm − 1 region was carried out using the tensorial formalism developed in Dijon for X 2 Y 4 asymmetric-top molecules. It relied on spectroscopic information available in the literature and retrieved from high-resolution Fourier transform infrared spectra recorded in Brussels in the frame of either the present or previous work. In particular, 645 and 131 line intensities have been respectively measured for the weak ν 10 and ν 4 bands. Including the Coriolis interactions affecting the upper vibrational levels 10 1, 7 1, 4 1 and 12 1, a total of 10 757 line positions and 1645 line intensities have been assigned and fitted with global root mean square deviations of 2.6 × 10 − 4 cm − 1 and 2.5%, respectively. Relying on the results of the present work and available in the literature, a list of parameters for 65 776 lines in the ν 10, ν 7, ν 4 and ν 12 bands of 12 C2 H4 was generated. To the best of our knowledge, this is the first time that a global intensity analysis is carried out in this range of the ethylene spectrum. Abstract : Highlights: High resolution Fourier transform spectroscopy of 12 C2 H4 between 600 and 1500 cm −1 . Line positions measured for the ν 10, ν 7 and ν 4 bands. Line intensities measured for the first time for the ν 10 and ν 4 bands. 10 757 line positions and 1645 line intensities fitted using a global tensorial model. HITRAN-formatted list of 65 776 lines for the ν 10, ν 7, ν 4 and ν 12 bands of 12 C2 H4 .