System and Method for Testing the Reaction of Rare Earth Ions.
DEPARTMENT OF THE ARMY WASHINGTON DC
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A crystalline bar is doped with a rare earth. The bar is transparent to radiation, such as from a laser, at a light wavelength which excites the rare earth ions in the bar and the light is modulated at the frequency at which the bar mechanically resonates. The excited ion decay radiatively by light or non-radiatively by phonons. As the phonons decay, they excite the bar to resonate mechanically. The mechanical resonance may be coupled by a piezoelectric material and measured to give information respecting the phonon activity of the excited rare earth ions. Author
- Inorganic Chemistry
- Nuclear Physics and Elementary Particle Physics