Excitation and Emission Curves and Processes (IMAGE)

American Institute of Physics

Excitation and Emission Curves and Processes

Caption

Left: Excitation curve (blue diamonds) and emission curve (red circles) showing that almost all of the emission spectrum of the GaAs scintillator is outside the absorption band. Right: Simplified diagram of excitation and emission processes. The silicon donor provides a population of conduction band electrons that recombine with holes trapped on the boron acceptors. Electron excitations as little as 1.44 eV can produce 1.33 eV photons.

Credit

Stephen Derenzo, Lawrence Berkeley National Laboratory

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