Thermoluminescence of rare earth activated CdSO4, SrSO4 and BaSO4 |
| |
| Authors: | RL Dixon KE Ekstrand |
| |
| Institution: | The Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, N.C. 27103, U.S.A. |
| |
| Abstract: | The thermoluminescence (TL) of rare earth (RE) activated sulfates of Cd, Sr and Ba was studied above room temperature. Many of the phosphors prepared exhibit an extremely bright TL following X-irradiation (most notably with Sm, Eu, Tb, Dy and Tm dopants), having an efficiency comparable to that of the highest sensitivity phosphors available for TL dosimetry, and exhibiting activator-induced glow peaks between 405 and 480°K. In a given lattice, the RE3+ ions produce a characteristic glow peak at the same temperature (independent of the particular RE ion), whereas Eu2+ produces a single glow peak at a different temperature. A decrease in glow peak temperature with increasing interatomic spacing was observed in the homologous SrSO4-BaSO4 system - this shift being most pronounced in the Eu2+ -doped materials. TL emission spectra were obtained for trivalent Sm, Tb, Dy and Tm and for divalent Eu in these sulfates (and also in CaSO4). |
| |
| Keywords: | Present address (to which all correspondence should be sent): Department of Radiology Bowman Gray School of Medicine Winston-Salem N C 27103 U S A |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
