Two-Photon Excitation of Autoionizing States through Zeros in the Continuum
- 7 November 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 51 (19) , 1753-1756
- https://doi.org/10.1103/physrevlett.51.1753
Abstract
A method is described for two-photon excitation of autoionizing states by use of two different-frequency photons in which the first photon reaches an energy which is near a maximum in the one-photon cross section but where the one-photon cross section is very nearly zero. This provides a large two-photon amplitude while suppressing the single-photon excitation. The application of the technique to study the Ba transitions by detecting the total ionization produced is described. No discrimination between ionization from one- and two-photon processes was required.
Keywords
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