Two- and three-photon resonant ionisation of strontium: energy and angular distribution of the electrons
D. FeldmannFakultat fur Phys., Univ. Bielefeld, Bielefeld, West GermanyK. H. WelgeFakultat fur Phys., Univ. Bielefeld, Bielefeld, West Germany
1982en
ABI
Abstract
Ionisation spectra of strontium have been measured using tunable laser radiation between 555 and 577 nm. The influence of bound two-photon resonances and autoionising three-photon resonances on the energy spectra and the angular distribution of the photoelectrons is studied for selected wavelengths. Four-photon ionisation via three-photon autoionising resonances is observed.
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