Luminescence study on Eu or Tb doped lanthanum–gadolinium pyrosilicate crystal

Abstract (Eu 0.01 , Gd 0.90 , La 0.09 ) 2 Si 2 O 7 (Eu:La–GPS) and (Tb 0.01 , Gd 0.9 0 , La 0.09 ) 2 Si 2 O 7 (Tb:La–GPS) crystals were grown by the floating zone method, and their optical and scintillation properties were investigated. Gd 3+ -to-Tb 3+ or –Eu 3+ energy transfer processes were found, and photo-luminescence and radio-luminescence emission spectra showed 5 D 0 – 7 F i ( i  = 1–4) Eu 3+ transitions in Eu:La–GPS, and 5 D 3 – 7 F i ( i  = 3–6) and 5 D 4 – 7 F i ( i  = 3–6) transitions in Tb:La–GPS. Using these scintillators, alpha-ray imaging was possible with a CMOS camera. These materials can be used for X-ray detection as well.