Stochastic theory of relaxation and collisional broadening of spectral line shapes
Author(s)
Faid, Karim
Advisor(s)
Fox, Ronald F.
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Abstract
A complete stochastic theory of relaxation is developed in terms of a homogeneous equation for the averaged density matrix of a system immersed in a thermal bath.
This theory is then used as the basis of a new stochastic approach to the phenomenon of collisional broadening of spectral line shapes. Single photon and multiphoton processes are studied.
The features of a line shape are linked by simple expressions to the statistical properties of a stochastic hermitian Hamiltonian. The ordinary line shape predicted by Kubo's approach is generalized. The present approach predicts broadening as well as asymmetry and shift. A representation of line shapes in multiphoton processes by diagrams is also developed.
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Date
1986-12
Extent
239 bytes
Resource Type
Text
Resource Subtype
Dissertation