Role of dopants in LiF TLD materials

Thermoluminescent Phosphors for Radiation Dosimetry

“…Subsequently, Lee et al [77][78][79] reported dosimetric characteristics of a new LiF:Mg,Cu,Si thermoluminescent (TL) material developed at KAERI, Korea and compared with those of commercially available LiF:Mg,Cu,P (GR-200A)(China). It is reported that LiF:Mg,Cu,Si thermoluminescence dosimeter (TLD) can be heated up to 573 K without any loss of TL sensitivity or any change in the glow curve structure.…”

Response of6LiF:Mg,Cu,Si and7LiF:Mg,Cu,Si TLD Pairs to the Neutrons and Photon Mixtures

“…This was mainly attributed to the enhanced reduction of the responses of Mg,Cu,P and Mg,Cu,Si doped LiF TLDs to higher LET of neutrons 3) . The LET dependence of LiF:Mg,Cu,Si is similar to that of LiF:Mg,Cu,P as indicated by the similarity in their photon energy dependence 3,4) but different than that of LiF:Mg,Ti. One of the striking outcome of the present study is that the relative responses of By assuming the response of the Harshaw TLD-700 to be negligible to neutrons and using it for the estimation of gamma rays doses in the mixed fields of neutrons and gamma rays for correcting for the gamma ray content, the relative neutron sensitivities (ratio of TL/mSv to neutrons and TL/mSv gamma rays) of TLD-600, LiF:Mg,Cu,Si, GR-206 and MCP-6 than TLD-600 and also of LiF:Mg,Cu,Si, GR-200 and MCP-N than TLD-100 are due to their reduced relative TL efficiencies to higher LET neutron radiation (mainly n-reaction).…”

“…Most 4 .5H 2 O and 0.9 mol % of SiO 2 was adopted. The major features of the new method of preparation were 1-avoidance of use of Na and P dopants in view of the conclusions on our earlier results, 2-use of a method of melting for activation instead of granulation at temperatures below the melting points and 3-adoption of a final dual-step thermal treatment at 300 °C for 10 min followed by 260 °C for 10 min for minimizing the intensity of the high-temperature glow peak responsible for the residual signal.…”

Effect of dopants’ concentration on high-dose high-temperature thermoluminescence of LiF:Mg,Cu,P detectors: Mg and Cu influence

“…Until now, studies of dopants concentration influence on TL emission were conducted in detail for the LiF based phosphors in the mGy dose range, where TL glow-curve is a typical one without the high-temperature TL peak ‚B' presence [e.g. Bos et al, 1996;Bilski et al, 1996;1997;Chen and Stoebe, 1998;2002;Lee et al, 2008;Patil and Moharil, 1995;Shoushan, 1988;Tang et al, 2008].…”