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Self-, Air-, and Nitrogen-Broadening in the ν1Band of SO2

✍ Scribed by B. Sumpf; O. Fleischmann; H.-D. Kronfeldt

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
187 KB
Volume
176
Category
Article
ISSN
0022-2852

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✦ Synopsis

The collisional line broadening of SO 2 transitions in the n 1 band was measured with SO 2 , air, and nitrogen as perturbers by applying a diode laser spectrometer in pulse mode. Eighteen lines from the P branch (5 £ JЉ £ 44, 0 £ KЉ a £ 20), eight lines from the Q branch (10 £ JЉ £ 40, 1 £ KЉ a £ 23), and five lines from the R branch (12 £ JЉ £ 35, 4 £ KЉ a £ 8) were investigated. The self-broadening coefficients g SO 2 -SO 2 show a significant decrease with increasing quantum number KЉ a as expected from the theory and vary from 0.41 to 0.16 cm 01 /atm. For small quantum numbers several coincidences with the theoretical predictions were found, whereas for larger quantum numbers stronger deviations occur. In the case of collisions with air (0.081 cm 01 /atm £ g SO 2 -air £ 0.111 cm 01 /atm) and nitrogen (0.095 cm 01 /atm £ g SO 2 -N 2 £ 0.124 cm 01 /atm), a weaker quantum number dependence of the broadening coefficients could be observed, in contrast to theoretical values.

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