Absorption probability dynamic part

This probability is determined by the amount to which vector E is contained in vector d. This quantity equals the hermitian product of the E and d [140]. The hermitian product can be written as the scalar product of E and d. As a result the probability Wabs of absorption of light, which is characterized by its E-vector, by a classical dipole is proportional to Ed 2. This probability can be divided into a dynamic part Tp... 

Here the proportionality factor fp ( J d J") 2/(2J +l) coincides with the dynamic part of the absorption probability introduced in Chapter 2. The sum in (5.10) presents the angular part of the absorption probability, whilst the factor (rmm + 0 %M ) 1 describes the effect upon /mm both on the part of perturbation by the external field, causing splitting of the magnetic sublevels j ujmm i and by spontaneous decay and collisions (anisotropic in the general case), together described by a set of relaxation rates Tmm Applying similar manipulations as for (5.7) to Eq. (5.6), we obtain an equation for fluorescence intensity ... 

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