Quantum cascade laser measurements of CH4 linestrength and temperature-dependent self-broadening and narrowing parameters at 7.16 µm

1Linestrength, temperature-dependent self-broadening and narrowing parameters of 10 CH4 transitions near 7.16 µm were measured over a temperature range of 290 - 1050 K.2The self-pressure-shift coefficient was found to change signs from negative to positive with increasing temperature and the Frost's formula fit well its temperature dependence.3Several weak transitions excluded from the HITEMP database were observed at elevated temperatures with the line positions given in this work.