THEORY OF ABSORPTION LINE SHAPES IN MONATOMIC GASES. II. METHOD OF ' 'QUASI-MOMENTS,' '
Abstract
The Kronig-Kramers theorem leads to a relation between the coefficients in an asymptotic expan sion of the refractive index in the far wings of an absorption line and certain integral proper ties, called 'quasi-moments', of the absorption line. The quasi-moments, or Q-moments, are related to the ordinary moments when the latter exist, and can be qualitatively related to such commonly measured quantities as the half width. Since the asymptotic coefficients are relatively easy to evaluate, this leads to a simple way of getting theoretical predictions for some prop erties of the line shape. The method is applied to the theory of a preceding paper, and results are obtained which are in qualitative agreement with experimental linewidths. It is also pos sible to take into account the correction to the strong linearity assumption made previously. The correction leads to a narrowing of the line ('non-linear narrowing') which is in the right direction to remove the remaining discrepancy between theory and experiment. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1962
- Accession Number
- AD0413810
Entities
People
- C.alden Mead
Organizations
- University of Minnesota