R L Dixon and K E Ekstrand 1974 Phys. Med. Biol. 19 196 doi:10.1088/0031-9155/19/2/006
R L Dixon and K E Ekstrand
Show affiliationsThe thermoluminescence of SrSO4 and BaSO4 doped with dysprosium and thulium was studied. The phosphors were crystallized from H2SO4 solution by evaporation. SrSO4:Dy and SrSO4:Tm exhibit the same glow curve, both having a major glow peak at 140 degrees C. BaSO4:Dy and BaSO4:Tm also exhibit identical glow peaks at 130 degrees C which are similar to the SrSO4 peaks except for the small shift in temperature. The sensitivities of SrSO4:Dy and BaSO4:Dy relative to CaSO4:Dy are 90 and 27%, respectively, for 60Co irradiation. The following dosimetric properties of these phosphors were also measured: fading, linearity with dose and response versus photon energy. SrSO4:Dy appears most suitable for dosimetry; particularly as a quality indicator for personnel dosimetry. Its behaviour from 100 mR to 1R is, however, somewhat nonlinear.
Issue 2 (March 1974)
R L Dixon and K E Ekstrand 1974 Phys. Med. Biol. 19 196
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