Abstract
Emission peculiarities of K5PrLi2F10 polycrystalline powders consisting of grains with mean diameter ranging from 25 μm to 200 μm were investigated as a function of the excitation energy density and temperature. Powder samples were excited at 470nm by light pulses 4ns long delivered by an Optical Parametric Oscillator. It has been found that at temperatures below about 100K almost all intensity of emission emerging from samples is contained in a single narrow and very intense red line related to the transition from unsplit 3P0 level to a crystal field component of the 3H6 level when the incident energy density is above well defined threshold value. Recorded plots of emission intensity versus incident excitation energy density made it possible to determine the threshold values and their dependence on the sample temperature. It has been concluded that the temperature-dependent self-quenching of the 3P0 emission restricts occurrence of the phenomenon observed to the low temperature region.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
