Abstract
AbstractA new semi‐empirical equation is proposed which predicts the extent of the observed spectral intensity enhancement caused by the effect of foreign gases on many infrared‐active gaseous molecules. The evolved expression has the form:Sv2μ−1=A exp {−B/(F+C)}Where S is a symmetry factor, v is the vibrational frequency (cm−1), μ is the reduced mass of the colliding pair, and F is the spectral enhancement factor for one atmosphere of foreign gas. A is a constant for a particular foreign gas, and B and C are general equation constants with values B = 18.5 and C = 1.5. Predicted and observed values of the enhancement factors are listed for a range of common gaseous molecules in the foreign gases nitrogen and helium. Suggested causes of the discrepancies between the calculated and experimental results are briefly discussed.
Published Version
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