Autoionizing levels

Generally, when studying autoionizing levels, we have to take into consideration both (radiative and radiationless) channels of their decay. The total natural width of the autoionizing level will be the sum of its autoionizing and radiative widths. 

Figure 8.11 Schematic illustration of rotational autoionization in para-H2 showing the transition from case (b) to case (d). The electronic continua associated with X2Ej (u+ = 0, N+ = 0 and 2) are depicted by light horizontal lines. The stable and autoionizing levels of the H2 np Rydberg series with v = 0 and J = 1 are shown as heavy horizontal lines.

B. Richie, Third-harmonic generation from a laser-induced autoionizing level, Phys. Rev. A 31 (1985) 823 Laser probe of the atomic ionization continuum Stimulated recombination into an excited state, Phys. Rev. A, 30 (1984) 1849. 

I. Sanchez, et al.. Investigation of a two-autoionizing-level system coupled by a strong laser field, J. Mod. Opt. 43 (1996) 953. 

Fig. 10.10 (a) Coherent control of the population of the coupled levels a) and b) by interference between two different excitation paths (b) excitation of autoionizing level (c) Fano profile of absorption line... 

Rydberg energy levels Even-parity autoionizing levels... 

Energy structure of levels near 0)4, e.g., autoionizing levels, matrix elements, line shapes... 

The recent femtosecond experimental data on electron solvation in water (Gaudel et al., 1984, 1987) and observations in a mass spectroscopy on the formation of electrons stabilized in molecular beam clusters (Arbruster et al., 1984) has rekindled extensive interest on the microscopic details of the dynamics and structure of e in particular. Since the appearance of the visible spectrum of e has now been observed from the two photon photoionization of pure water (e.g., no dopant molecules or ions were present) we must focus on what responses can be Induced from the medium on this timescale. From our present databank, it is evident that following the instantaneous electronic polarizability (linear and nonlinear) response to the moving charge and/or field, it is the librational responses that must be the key motion. We assume, for the moment, that the lifetime of the autoionizing level in H2O is not a significant factor. As we have discussed elsewhere (Kenney-Wallace,... 

Fig. 9.5 Ionization of a highly excited atom in an external electric field (a) field-free electron levels and (b) modification of the potential in an external electric field and the formation of autoionization levels.

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