Low Energy Ion-Electron Luminescence - A New Technique for the Excitation of Inorganic Phosphors.
GTE LABS INC WALTHAM MASS
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A new technique for the excitation of inorganic phosphors by low kinetic energy ions 40 eV and low kinetic energy electrons 20 eV has been demonstrated and characterized. The characteristic light output of the phosphor has been used as a probe of the excitation mechanism. An empirical relationship between the light output and the ion and electron currents has been determined and used to ascertain the change in light output as a function of ion and electron kinetic energy and ionization potential. The excitation mechanism starts with the formation of holes by the ion beam. Although the holes are mobile in the lattice, some of the holes get trapped. In a second step electrons interact with these trapped holes to create an excited states of the phosphor. Energy is transferred to the luminescent centers resulting in the characteristic emission of the phosphor. The slow or rate-limiting step in the production of light by low energy ions and electrons is the emission of light.
- Radiation and Nuclear Chemistry
- Solid State Physics