Abstract
Expressions used for extracting the population and alignment parameters of a symmetric top molecule from (n+1) laser-induced fluorescence (LIF) are derived by employing the tensor density matrix method. The molecular population and alignment are described by molecular state multipoles. The LIF intensity is a complex function of the initial molecular state multipoles, the dynamic factors, and the excitation-detection geometrical factors. The problem of how to extract the initial molecular state multipoles from (2+1)LIF, as an example, is discussed in detail.
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