On the relationship between dose-, energy- and LET-response of thermoluminescent detectors

Radiation Protection Dosimetry
Pawel OlkoMichael Patrick Russell Waligórski

Abstract

Measurements of the response of thermoluminescent (TL) detectors after gamma ray doses high enough to observe signal saturation provide input to microdosimetric models which relate this gamma-ray response with the energy response after low doses of photons (gamma rays and low-energy X rays) and after high-LET irradiation. To measure their gamma ray response up to saturation, LiF:Mg,Ti (MTS-7 and MTT), LiF:Mg,Cu,P (MCP-7), CaSO4:Dy (KCD) and Al2O3:C detectors were irradiated with 60Co gamma rays over the range 1-5000 Gy. The X-ray photon energy response and TL efficiency (relative to gamma rays) after doses of beta rays and alpha particles, were also measured, for CaSO4:Dy and for Al2O3:C. Microdosimetric and track structure modelling was then applied to the experimental data. In a manner similar to LiF:Mg,Cu,P, the experimentally observed under response of alpha-Al2O3:C to X rays <100 keV, compared with cross-section calculations, is explained as a microdosimetric effect caused by the saturation of response of this detector without prior supralinearity (saturation of traps along the tracks). The enhanced X-ray photon energy response of CaSO4:Dy is related to the supralinearity observed in this material after high gamma ray dose...Continue Reading

References

Oct 18, 2002·Radiation Protection Dosimetry·P OlkoJ L Kim

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Citations

Dec 25, 2010·Radiation Protection Dosimetry·Th OttoM Strasser
Oct 9, 2013·Physics in Medicine and Biology·Phillip J TaddeiWayne D Newhauser
Jan 9, 2021·Radiation Protection Dosimetry·Paweł Olko, Paweł Bilski
Jan 12, 2021·Radiation Protection Dosimetry·Tomas KronEduardo G Yukihara

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