Abstract
Absorption, emission, excitation spectra of CaF 2 , SrF 2 , BaF 2 crystals doped by PrF 3 in concentration ranging from 0.005% to few molar % were studied in 1.4–10 eV spectral region. Specific type of Pr centres possessing photon cascade emission (PCE active) was observed in all crystals. Concentration of centres monitored by excitation and emission spectra grows superlinearly with increasing of Pr concentration in SrF 2 and BaF 2 crystals. A new additional absorption band at 7.0 eV which coincided with excitation band of PCE-active centres was observed in CaF 2 – Pr crystals. The absorption coefficient of this band grows twice that coefficient of 5.7 eV band of single Pr centres.
Sign-in/Register to access full text options 
Free) 
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
