Observation of autoionizing resonances in core electron shakeup spectra

Experimental investigation of core-valence double photoionization

Core-valence double photoionization has been observed in Ne atoms and N2 molecules using a magnetic-bottle time of flight spectrometer. The multielectron coincidence data sets give complete information on the energy correlations between all emitted electrons, which supports a detailed description of the core-valence double photoionization processes including direct spectroscopy of the core-valence doubly ionized states, the final states populated by their Auger decay and details of the dynamics of core-valence double photoionization for selected states.

Single-molecule X-ray diffraction

Free-electron lasers could provide femtosecond X-ray flashes with a peak brilliance 10-11 orders of magnitude higher than that which is currently available from synchrotrons. Such pulses may allow structural studies of single biomolecules before radiation damage destroys them and may permit the imaging of complex structures without the need to amplify scattered radiation through Bragg reflections.