Intensity Measurements and Collision-Broadening Coefficients for the Oxygen A Band Measured by Intracavity Laser Absorption Spectroscopy

Measurement of ultraweak transitions in the visible region of molecular oxygen

“…Our measured line-positions are all in agreement with those listed in the HITRAN database, which for lower J (J 00 < 25) are measured [2] and for higher J extrapolated. The P39Q38, P37P37, and P37Q36 transitions were recently measured by Yang et al [9] and our line intensities and Lorentzian half-widths compare well with their results as shown in Fig. 2.…”

“…The uncertainties are larger for the R branch, since many of these transitions overlap so that the fitting is more difficult. Yang et al [9] recently made accurate measurements of the P5P5, P7Q6, P7P7, and P9Q8 transitions and in Fig. 3 we compare our measured line intensity and linewidth for the transitions with their measurements and the calculated values in the HITRAN database.…”

“…The hot band was identified in early measurements of atmospheric absorption features in the solar spectrum [8]. More recently, four of the strongest transitions in this band, together with high J transitions of the A band, were measured by Yang et al [9] using intra-cavity laser absorption spectroscopy.…”

Molecular Constants for the v=0, b1Σg+ Excited State of O2: Improved Values Derived from Measurements of the Oxygen A-Band Using Intracavity Laser Spectroscopy

“…The b 1 + g -X 3 − g electric dipole and spin-forbidden electronic transition of O 2 , long designated the atmospheric A band in the solar spectrum, has been the subject of several recent studies (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11). These are motivated by various applications.…”

A study of collision broadening in the O2 A-band with the noble gases using fourier transform spectroscopy

“…Several experimental techniques were employed to record absorption line shapes for rotational transitions in this spectroscopic band from which broadening coefficients were extracted. These studies included the use of grating instruments [10][11][12], a high-resolution dye laser spectrometer [13], tunable diode lasers [1,[14][15][16][17][18], and more recently, intracavity laser absorption spectroscopy [19]. The majority of these studies utilized N 2 , O 2 , and ''air'' as collision partners for obvious atmospheric applications.…”