Photoionization spectra, excitation schemes

Figure 3. Photoionization threshold spectra for neodymium. The excitation scheme used in each case is shown on the figure. The scanned laser wavelength calibration is shown at the top of each spectrum. In (a) the 20 300.8 cm 1 level is populated and in (b) the 21 572.6 cm 1 level is populated. The threshold wavelengths indicated yield the same ionization limit value of 5.523 eV. The arrows labeled R. L. indicate the position of the Rydberg convergence limit (3).

Figure 4. Neptunium photoionization threshold spectrum. The excitation scheme is shown at the left. The threshold at 4593 A is marked by the onset of very strong autoionization peaks. It yields an ionization potential of 50 518 cm 1...

Fig. 4.41 Spectroscopy of fragmentation products produced by photoionization and excitation of large molecules (a) experimental setup (b) level scheme and (c) spectrum of the fragment ion...

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