Characteristics of LiF:Mg,Cu,P thermoluminescence at ultra-high dose range

Advantages and challenges of high-dose thermoluminescent detectors

“…Among the existing high-dose luminescent detectors the polycrystalline LiF:Mg, Cu, P detectors have the best dosimetric parameters. For the first time behavior of these detectors under high-dose gamma-irradiation was studied by Polish researchers (Bilski et al, 2008;Obryk et al, 2009). It was found that the main dosimetric peak at 200 C diminishes for doses starting from about 50 kGy under Co-60 g-rays irradiation.…”

Alpha particle and proton relative thermoluminescence efficiencies in LiF:Mg,Cu,P:is track structure theory up to the task?

“…Accurate measurements of f (D) at high dose levels require computerised glow curve deconvolution (CGCD) due to the appearance of a strongly supralinear high-temperature glow curve structure which overlaps substantially with peak 4. CGCD has been carried out up to dose levels of 1000 Gy (52) for GR-200 and 5000-10 000 Gy (7,53,54) for MCP-N. The previously published MCP-N data have been re-analysed in this work with a typical deconvoluted glow curve at high dose as shown in Figure 6 resulting in the values of f (D) shown in Figure 11 and Table 2.…”

Advantages and disadvantages of luminescence dosimetry

“…The energy of the ions is modulated to cover the irradiated volume with a uniform dose, called Spreading Out of the Bragg Peak (SOBP), where a broad spectrum of energies is present. Relative luminescence efficiency for 11 keV/mm carbon ions vs. 60 Co g-rays for Al 2 O 3 :C is about 0.80 (Yukihara et al, 2006), and 0.51 for LiF:Mg,-Cu,P (Bilski et al, 2008). Heavily doped supralinear MTT-N (LiF:Mg,Ti) shows h ¼ 1.07 for 2.2 keV/mm 4 He ions and h ¼ 1.02 for 11 keV/mm 12 C ions, but high fading of this material makes precise postal dosimetry difficult.…”