Oscillator strength ionization

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. 

The BEB model was developed to overcome this problem. The dipole oscillator strength is assumed to have a simple form based on the approximate shape of the function for ionization of ground-state hydrogen ... 

The parameter e0 was chosen for best agreement with the experimental data of Opal et al.52 at = 500 eV. Jain and Khare applied this equation to the calculation of ionization cross sections for C02, CO, HzO, CH4, and NH3 and achieved fairly good agreement with experiment for all cases except for CO, where the cross section was too low, though the ionization efficiency curve still exhibited the correct shape. The main limitation of this method, which it has in common with the BED theory, is the inclusion of the differential oscillator strengths for the target molecule which restricts the number of systems to which it can be applied. 

The relative success of the binary encounter and Bethe theories, and the relatively well established systematic trends observed in the measured differential cross sections for ionization by fast protons, has stimulated the development of models that can extend the range of data for use in various applications. It is clear that the low-energy portion of the secondary electron spectra are related to the optical oscillator strength and that the ejection of fast electrons can be predicted reasonable well by the binary encounter theory. The question is how to merge these two concepts to predict the full spectrum. 

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,... 

Fig. 30. The total differential oscillator strength for benzene including the structure factor but neglecting any vibrational effects. The cross-hatched portion of the figure represents the transition to a continuum orbital of e2ll symmetry, while the remainder is for a transition to an elu orbital. The positions of higher ionization thresholds are indicated.

The ionization of NO by the Lyman-a line is the main source of ions in the D region. The photodissociation of NO in the upper atmosphere occurs from the /t2Z + (F > 4), B2n (c > 7), and C2n (F > 0). The dissociation rate of NO by the solar radiation is proportional to the integrated absorption coefficient of various bands (that is, the oscillator strength). From Table V 4 it can be seen that absorption by the /if (12,0) and 6 bands is most important in leading to photodissociation. 

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