11.08.2010
At the soft x-ray Free-electron LASer in Hamburg FLASH, for the first time, a so-called Two-photon Above-Threshold (ATI) ionization process in an inner electron shell was detected. The corresponding electron spectroscopy results are discussed in a recent issue of Physical Review Letter and relate to former results of ion spectroscopy on Xe atoms performed at ultrahigh irradiance in the extreme-ultraviolet (EUV).
The present experiments were performed within the framework of an international cooperation of PTB’s department Radiometry with Synchrotron Radiation and the development of photon diagnostic tools for x-ray lasers that are based on gas-phase photoionization.
Contact:
M. Richter, 7.1, E-Mail: Mathias.Richter(at)ptb.de