Novel Materials Laboratory

Department of Physics

Department of Chemistry

Division of Materials Science and Engineering

Soft X-Ray Emission Spectroscopy

In the x-ray emission experiment, a solid is illuminated with a monochromatic beam of x-rays. These excite core electrons from the system. The resulting core holes are filled by the radiative transition of valence band electrons, with the emission of a fluorescent x-ray photon. The energy of these emitted photons is then measured using a grating spectrometer.

 hn = 50 ~ 1500 eV

 Bulk sensitive (~ 1000 ), so no need for large crystals, or clean ordered surfaces

 Atomic and chemical specific

 Strong dipole selection rules means the fluorescent spectrum reflects the occupied valence band partial density of states

 Operational in external fields and (windowed) liquid environments