Sensitization of Luminescence of CaSO4: Dy

Abstract

The increase in photoluminescence and thermoluminescence of CaSO4: Dy TLD phosphor by co‐doping with Ce or P is described. Cerium is found to sensitize the PL but not the TL. P doping helps incorporation of Dy in higher concentration. PL increases by 150% while the increase in TL is about 50%. It is claimed that the CaSO4: P, Dy phosphor thus prepared is a suitable replacement for CaSO4: Dy currently in use in TLD and personnel monitoring.

Effects of non-stoichiometry and substitution on photoluminescence and afterglow luminescence of Sr4Al14O25:Eu2+, Dy3+ phosphor

“…6A, silver codoping enhanced the PL intensity of Eu 2+ by more than two times. This could be due to increased solubility of Eu 2+ in the host in the presence of charge-compensating monovalent ions [29][30][31]. Interestingly, the afterglow intensity (Fig.…”

Dy3+and Mn2+ emission in KMgSO4Cl phosphor

“…However, the application of a similar energy transfer mechanism leads to enhanced sensitivity in the case of TL and PL. During the course of investigation on TL in sulphate-based phosphors, we have reported several sulphate phosphors possessing properties useful to TL dosimetry of ionizing radiations [12][13][14][15][16][17]. Other than sulphate material, some investigations are in progress on halosulphate-based materials.…”

Correlated ESR, PL and TL studies on Sr5(PO4)3Cl:Eu thermoluminescence dosimetry phosphor

“…In recent years, we have developed sensitive TL phosphors, namely K 3 Na(SO 4 ) 2 :Eu [1], CaSO 4 :P,Dy [2], MgB 4 O 7 :Dy [3], Sr 2 B 5 O 9 Cl:Eu [4], Sr 5 (PO 4 ) 3 Cl:Eu [5], Li 2 SO 4 :P,Dy [6] and CaB 4 O 7 :Dy [7], which could be used in personnel and environmental radiation dosimetry. Rare earth doped phosphate and oxide phosphors are widely used in X-ray imaging and fluorescent lamp manufacturing [8].…”