Photoionization of laser-excited caesium atoms above the 4d ionization threshold

Angelica Moise (1) , Michele Alagia (2, 3) , Lorenzo Avaldi (4) , Vitaliy Feyer (1) , Kevin C Prince (1, 3) , Robert Richter (1)

1 Sincrotrone Trieste
2 CNR-ISMN
3 CNR-IOM
4 CNR-IMIP

The photoionization of ground state and 6p laser-excited Cesium atoms was studied above their 4d ionization threshold. The 4d photoelectron spectrum of 6p laser-excited atoms shows a stronger excitation of satellites upon ionization than its ground state counterpart. The relative intensities of satellite and main photolines show a slow variation with the incoming photon energy for both the ground state and the 6p laser-excited states. An assignment of the excited state spectra, supported by recently published ground state photoionization spectra and calculations, is given and a preliminary analysis of the 4d Auger spectrum of laser-excited atoms is also presented.

Mots clés: core ionization; atomic spectroscopy; two-color experiments; laser and synchrotron radiation; PACS: 82.53.Hn; 42.62.Fi; 32.30.–r; 32.80.Dz

Angelica Moise, Michele Alagia, Lorenzo Avaldi, Vitaliy Feyer, Kevin C Prince, et al.. Photoionization of laser-excited caesium atoms above the 4d ionization threshold. Journal of Physics B: Atomic, Molecular and Optical Physics, 2010, 43 (21), pp.215001. ⟨10.1088/0953-4075/43/21/215001⟩. ⟨hal-00569859⟩