Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1880547 | Radiation Measurements | 2014 | 4 Pages |
Abstract
A need to study the effect of pre-irradiation annealing on LiF:Mg,Ti was recognized to enhance the intensity of its high-temperature thermoluminescence (HTTL), and the ratio of HTTL and dosimetric glow peaks (DP). Slow cooling following thermal annealing enhanced the intensity of HTTL and reduced the DP. Following 400 °C - 1 h annealing (established for this type of phosphor and used widely), additional pre-irradiation annealing treatments and oven-cooling (by switching off the power to the oven) were investigated in steps of 20 °C in the range of pre-set temperatures from 400 °C to 100 °C. The oven-cooling from pre-set temperature of â¼170 °C enhanced the HTTL and the HTTL/DP ratio by up to 1.66 and 4.88 times, respectively, as compared to that for the fast cooling from 400 °C but reduced the DP by 2.9 times. The slow cooling from pre-set temperatures in the range of 180 °C-160 °C appears crucial for the intensities of DP and HTTL, and thereby for the applicability of LiF:Mg,Ti in mixed-field dosimetry of low and high LET radiation.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
A.S. Pradhan, J.I. Lee, J.L. Kim, I. Chang,