A high pressure test of the theory of energy transfer by sensitized luminescence

Measurements have been made of sensitized luminescence in the phospor KCl:Ag:Tl in the fcc phase to 18 kbar. The studies include both lifetimes and relative emission intensities of the two dopants. Both the lifetimes and relative intensities gave quantitative agreement with theory over the pressure range. The calculated efficiencies ranged from ∼0.08 to ∼0.28. Measurements from 100 to 300 °K at 8 and 18 bar also agreed with theory. Some more limited measurements on KCl:Ag:Pb in the same pressure range also exhibited satisfactory correspondence to the theory.