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|Title:||Redox reactions, radio-photoluminescence and thermoluminescence in CaSO4:Eu|
|Publisher:||IOP PUBLISHING LTD|
|Citation:||JOURNAL OF PHYSICS-CONDENSED MATTER, 9(39), 8307-8323|
|Abstract:||CaSO4:RE phosphors find applications in dosimetry of ionizing radiations. Phosphors having Dy:or Tm activators are high-sensitivity thermoluminescence dosimetry materials, while the phosphors with Eu or Sm activators are the proposed materials for radio-photoluminescence dosimetry. Mechanisms of several processes related to various luminescence phenomena, however, are not yet properly understood. Usually, all CaSO4:RE phosphors are prepared under identical conditions and comparative studies are carried out. It is shown here that the form in which the impurity is incorporated and the nature of defects produced is quite different in CaSO4:Eu than in CaSO4:Dy. The results presented throw light on the mechanism for thermoluminescence, radio-photoluminescence, incorporation of the impurity and Eu3+ <->, Eu2+ conversion.|
|Appears in Collections:||Article|
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