Intensity-dependent near-threshold ionization of Kr in the vacuum-uv
- Varvarezos, Lazaros
- John T, Costello
- Meyer, Michael
- Mazza, Tommaso
- Kabachnik, Nikolay
- Johnsson, Per
- Kazansky, Andrey
- Kelly, Mossy
- Duesterer, Stefan
- Bomme, Cedric
- Erk, Benjamin
- Hartmann, Gregor
- Rompotis, Dimitrios
- Manschwetus, Bastian
- Savelyev, Evgeny
- De Fanis, Alberto
DOIAbstract
In this work, we present measurements of the intensity-dependent photoelectron spectrum of Kr irradiated by the FLASH FEL tuned to a photon energy of 25.8 eV. Intensity dependent photoelectron spectra were obtained with the aid of a Velocity Map Imaging (VMI) spectrometer. As the FEL photon energy is close to threshold, two photon sequential double ionization is favoured. The number of open channels is kept to a minimum and leading to a simple description of the process
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