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This paper reports the F-centers and photostimulated luminescence of Eu~(2+)-activated Sr_3Ca_2(PO_4)_3Xcrystals.The influence of various halide ions on the F-centers and their energy level is discussed.The mechanismfor the photostimulated luminescence and valence change of Eu ion in that process have been investigated.
This paper reports the F-centers and photostimulated luminescence of Eu ~ (2 +) - activated Sr_3Ca_2 (PO_4) _3Xcrystals. The influence of various halide ions on the F-centers and their energy level is discussed. The mechanism for the photostimulated luminescence and valence change of Eu ion in that process have been investigated.