Experimental and theoretical cross sections for photoionization of metastable Xe*. (6s
3
P
2, 3
P
0) atoms near threshold |
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Authors: | R Kau I D Petrov V L Sukhorukov H Hotop |
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Institution: | 1. Fachbereich Physik, Universit?t Kaiserslautern, Kaiserslautern, D-67653, Germany
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Abstract: | Using high resolution laser photoelectron spectrometry we have determined absolute cross sections σJ 0 J 1 and the electron angular distribution parameter for one photon ionization of metastable Xe*(6s 3 P J0, J 0 = 2, 0) atoms to the resolved Xe+ (2 P J1, J 1 = 3/2, 1/2) ion states at several wavelengths near threshold. For comparison with the present and future experimental data we have calculated partial cross sections and ß-parameters for photoionization of Xe*(6s 3 P J0, J 0 = 2, 0) and of the analogous alkali atom Cs(6s) over the photoelectron energy range (0–5) eV. We have used both a term-dependent Pauli-Fock (PF) approach and a configuration interaction method involving Pauli-Fock atomic orbitals (CIPF). Through the PF method we include relativistic effects on the atomic orbitals; the CIPF method was designed to take into account the important electron correlation effects which are found to be essential for obtaining good agreement between the theoretical and experimental results. |
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