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An Improved LiF:Mg,Cu,P Chip with a Low Residual Signal

DOI

11

Citations

0

References

1999

Year

Kaiyong Tang, G.G. Cai, Weihui Shen, Lu Min, Haitao Zhu
Radiation Protection Dosimetry

Abstract

An improved preparation procedure has been adopted by changing Cu concentration and sintering temperature to lower the residual signal of LiF:Mg,Cu,P. The sensitivity of LiF:Mg,Cu,P can reach 65 times as high as that of TLD-100, while its residual signal is higher than 1% following a 240(C for 12 s readout. By the improved preparation procedure, the residual signal of LiF:Mg,Cu,P can be 0.4% at the expense of lowering sensitivity to 41 times as high as that of TLD-100. This negligible residual signal enables LiF:Mg,Cu,P TLD to be workable with an 'unannealed' regime. The dependence of glow curve structure, TL sensitivity and residual signal on Cu concentration and sintering temperature are described.