Measurement of absolute line intensities in the ν5 - ν4 band of 12C2H2 using SOLEIL synchrotron far infrared AILES beamline
Résumé
Absolute intensities of about 120 lines of the 12C2H2 molecule are reported for the ν4 − ν5 band between 65 and 192 cm−1, with an average accuracy of 5%. Vibrational transition dipole moment squared values and empirical Herman-Wallis coefficients are obtained allowing modelling the rotational dependence of the transition dipole moment squared. Special care is taken to accurately determine an apparatus function for the Bruker IFS 125-HR coupled to the synchrotron SOLEIL far infrared AILES beamline in order to minimize its effects on the line parameter retrieval.
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