TY - JOUR
T1 - Luminescence efficiency of Al2O3:C,Mg radiophotoluminescence in charged particle beams
AU - De Saint-Hubert, Marijke
AU - Freire De Souza, Luiza
AU - Kodaira, Satoshi
AU - Swakoń, Jan
AU - De Freitas Nascimento, Luana
N1 - Score=10
PY - 2019/4
Y1 - 2019/4
N2 - In hadron therapy, it is important to evaluate how sensitive a detector is upon radiation with varying ionization densities, i.e. linear energy transfer (LET), as the LET changes when penetrating through material. For solid-state detectors, it is therefore essential to characterize the luminescence efficiency (ηHT,γ) of the detector as a function of LET. In this work, we investigate the radiophotuminescence (RPL) response from Al2O3:C,Mg 2D films and crystals exposed to various high LET beams
(1H, 4He, 12C, 28Si and 56Fe). The measured ηHT,γ curve from RPL films and crystals as function of the particle LET is compared with the ηHT,γ curve from Al2O3:C OSL samples. Furthermore, a 2D RPL image, from Al2O3:C,Mg films irradiated with a 61.3 MeV 40mm diameter broad proton beam, depicts a 2D depth dose distribution of the Bragg peak and demonstrates similar LET dependence as from the luminescence efficiency curve. The ηHT,γ curves are consistent with Birks’ law, where we
observe expected quenching for increasing LET
AB - In hadron therapy, it is important to evaluate how sensitive a detector is upon radiation with varying ionization densities, i.e. linear energy transfer (LET), as the LET changes when penetrating through material. For solid-state detectors, it is therefore essential to characterize the luminescence efficiency (ηHT,γ) of the detector as a function of LET. In this work, we investigate the radiophotuminescence (RPL) response from Al2O3:C,Mg 2D films and crystals exposed to various high LET beams
(1H, 4He, 12C, 28Si and 56Fe). The measured ηHT,γ curve from RPL films and crystals as function of the particle LET is compared with the ηHT,γ curve from Al2O3:C OSL samples. Furthermore, a 2D RPL image, from Al2O3:C,Mg films irradiated with a 61.3 MeV 40mm diameter broad proton beam, depicts a 2D depth dose distribution of the Bragg peak and demonstrates similar LET dependence as from the luminescence efficiency curve. The ηHT,γ curves are consistent with Birks’ law, where we
observe expected quenching for increasing LET
KW - Radiophotoluminescence
KW - 2D dosimetry QA
KW - Radiotherapy
KW - RPL film
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/33740523
U2 - 10.1016/j.radmeas.2018.12.015
DO - 10.1016/j.radmeas.2018.12.015
M3 - Article
SN - 1350-4487
VL - 123
SP - 4
JO - Radiation Measurements
JF - Radiation Measurements
ER -