Continuum unstructured

We note that A iE) and F ( ) are the energy-dependent shift and width of the state 10 ) in Q, which now has become a resonance, since A(5 , c) = (fg c,E ) give rise to a typical (scattering) resonance line shape. We also note that the shift A ( ) for each state vanishes if one neglects the energy variation of the A(i , c), which is the case when the resonance widths are independent of the energy, or equivalently, when an unstructured continuum in the V subspace is assumed. 

Figure 9.8 The formation of the BIT hole for unstructured continuum. Fq = 0.05 X 10 a.u., Fj = 0, and = 0. Shown is the lineshape (Eq. 9.45) at three different times, (X) - at the peak of the pulse i = 0, (I I) - as the pulse begins to wane, t = 0.75 X 10 a.u., and (full line) - at the tail of the pulse, t = 1.5x10 a.u.. A simple Gaussian pulse of the form EjCP = Ege was assumed. Reprinted figure by permission from Ref. [36]. Copyright 2007 by the American Physical Society.

A recent publication [81] reports some new experimental data on alkali metal/halogen flames studied by highly dilute flame technique. For the sodium/chlorine flame, it is reported that the D-line emission is predominant only in the lower portion of the tube (see Fig. 1). In the upper portion an apparently unstructured continuum is dominant. On this basis, Struve et al. [81] conclude that the original conclusion [2] implying exclusion of the direct excitation mechanism... 

The contribution of the free one-photon states to the absorption for unstructured continuum is shown in Figure 3.12. 

Spectral continuum. Spectral interference caused by one of the matrix components emitting a continuum spectrum at the analyte line wavelength, may be overcome by changing the analyte line or by using chemical separation. For example, in the emission spectrum of aluminium an unstructured continuum begins at 212 nm and continues down below 190 nm (Figure 133). This causes a problem with the emission lines of cadmium (at... 

Computational Fluid Dynamics Modeling Unstructured Continuum Approach (Euler-Euler)... 

P(E) corresponds to the number of occupied states per unit energy range. Only under conditions of an unstructured continuum, constant probability and constant transport and escape, would a photoelectron spectrum be a direct measure of the density of states, I)(E). 

---