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The pressure shifts, δ, of the (0–0) band of the b1Σg+–X3Σg− electronic transition of oxygen (the so-called ‘A-band’) have been measured at room temperature using high-resolution Fourier transform spectroscopy. The rotational dependence of δ has been measured and characterised; the average value of the shift over the whole band is −0.009±0.001 cm−1 atm−1. No significant variation in δ is found for different O2 mixing ratios in N2, and the results presented here are therefore appropriate for high-resolution atmospheric applications using the O2 A-band. [Copyright &y& Elsevier]

High-resolution infrared spectra of the ν6 fundamental asymmetric axial S–F stretching vibrational mode of 32SF4 have been recorded in absorption at 296 K using a Fourier-transform infrared (FTIR) spectrometer. The band is centred at 729.7 cm−1. In total, 1550 a-type vibration–rotation transitions have been assigned. Analysis of the data has yielded precise spectroscopic constants for the ν6=1 state, as well as revised constants for the ground vibrational state. Other features in the FTIR spectra are attributed to difference-band transitions from excited vibrational levels of the ν4 and ν9 vibrational modes. [Copyright &y& Elsevier]