Absolute line intensities determination in the ν7 band of C2H4

Absolute intensities have been measured for 26 lines of C2H4 in the ν7 fundamental transition, using a tunable diode-laser spectrometer. These lines with 3≤J″≤21, 2≤Ka≤4, 2≤Kc≤20 are located in the spectral range 920–980 cm−1. The intensities have been measured by using two methods: the equivalent width method (EWM) and the line profile fit method (FPM). For the last one, three models have been tested: Voigt, Rautian and Galatry profiles.