Oscillator strength potentials

CEX (ionization potential) = 13.6 eV, Yn = 6.08 eV f°r N atom of indoline ring is used in PPP calculation. The carbon for indoline component is ignored for PPP calculation. Other parameters listed in Ref. 15. Oscillator strength. 

Here/(q) is the dipole oscillator strength distribution at q and e is the base of natural logarithm. The lowest excitation potential may be taken for qmin, whereas qmax = (E + EB)/2 with EB a defined mean electron binding energy (Mozumder and La Verne, 1984). 

The vertical ionization potentials of the (lt2) and (2ai) ionic states are indicated in Fig. 2, while that of the (lai) ionic state is far away from the range in Fig. 2. Kameta et al. examined their photoabsorption cross sections c in terms of the TKR sum rule for the oscillator-strength distribution dfjdE, Eq. (3), following the conversion of a to dfjdE,... 

In energy transfers above the ionization threshold, it is usual for several different ionization processes to occur with probabilities depending on E. The measured optical oscillator strength for absorption is thus a sum corresponding to a variety of different processes. Denoting this total optical oscillator (ionization potential) strength by df(0)/dE, we have, for... 

Certain semi-empirical methods are aimed at choosing the effective potential, allowing one to determine as accurately as possible values of oscillator strengths of electronic transitions others, more complex, are also directed at achieving the best correspondence between calculated energy spectra and experimental ones. 

The main advantage of the effective potential method consists in the relative simplicity of the calculations, conditioned by the comparatively small number of semi-empirical parameters, as well as the analytical form of the potential and wave functions such methods usually ensure fairly high accuracy of the calculated values of the energy levels and oscillator strengths. However, these methods, as a rule, can be successfully applied only for one- and two-valent atoms and ions. Therefore, the semi-empirical approach of least squares fitting is much more universal and powerful than model potential methods it combines naturally and easily the accounting for relativistic and correlation effects. 

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