Schippers, W.W.SchippersKöhring, M.M.KöhringBöttger, S.S.BöttgerWiller, U.U.WillerFlachenecker, G.G.FlacheneckerSchade, W.W.Schade2022-03-042022-03-042014https://publica.fraunhofer.de/handle/publica/23536310.1007/s00340-013-5647-3Molecular rotational states of nitrogen and oxygen molecules at room temperature and atmospheric pressure are excited by femtosecond double- and multi-pulses with variable temporal pulse distances, and quartz-enhanced photoacoustic spectroscopy is used for their detection. A simple extrapolation of measured double-pulse data is presented, which predicts form and position of Raman-excited spectral features and thus enables us to distinguish between spectral lines caused by Raman-scattering- and collision-induced absorption both appearing when excitation by pulse trains is used.en621Simultaneous detection of Raman- and collision-induced molecular rotations of O2 and N2 via femtosecond multi-pulses in combination with quartz-enhanced photoacoustic spectroscopyjournal article