Absorbed Dose Measurement and LET Determination with TLDs in Space

The response of thermally and optically stimulated luminescence from Al2O3:C to high-energy heavy charged particles

“…The advantage is that, while R is not a monotonic function of the LET (Yukihara et al, 2004), the ratio 1= 2 is monotonic. More research is still necessary to establish a method for extracting information from unknown radiation ÿelds using the LET dependence of Al2O3:C, but similar types of LET dependences of TL curves have been used in space dosimetry (Vana et al, 1996;Yasuda, 2001Yasuda, , 2002Yasuda and Fujitaka, 2002). One problem, however, is that the e ciency is not uniquely determined by the radiation LET.…”

Dependence of the thermoluminescent high-temperature ratio (HTR) of LiF:Mg,Ti detectors on proton energy and dose

“…The HTR method is based on the assumption that unequivocal functional relationships exist between the HTR parameter and LET and between HTR and relative TL efficiency. These relationships may be used to estimate LET in an unknown radiation fields (Vana et al, 1996), as well as to correct the decreased relative TL efficiency for high-LET radiation (Berger et al, 2006a). The limitations of the HTR method were recently discussed (Bilski, 2010).…”

Investigation of the ionisation density dependence of the glow curve characteristics of LIF:MG,TI (TLD-100)

“…Various authors (12,13) have promoted the use of the HTTL as an estimator of average LET in space radiation fields due to the enhanced relative intensity of the HTTL at high-ionisation density (HID). This phenomenon was probably documented originally in the early 1980s (14) in the hope that it would be possible to measure both 'low-LET' and 'high-LET' radiation dose simultaneously with one detector.…”

“…Attempts were made to apply the 'two-peak-method' to fast neutron radiation fields in clinical dosimetry (15) , even though it was acknowledged that both Peak 5 and the high-temperature structure are supralinear to both neutrons and gamma rays in the dose region applicable to clinical irradiations. In later applications in space radiation fields (12,13) , essentially the same analysis method was dubbed the 'high-temperature ratio' (HTR) method, in which the ratio of the intensity of the TL light emission in the high-temperature region ($225-3008C) to the light intensity of glow Peak 5 following HID radiation is compared with the same ratio following gamma or electron LID irradiation. Although the technique has been claimed to be highly successful, it has also been criticised (16,17) on various grounds, both technical and theoretical, which are beyond the scope of this paper.…”