TY - JOUR
T1 - Theoretical and experimental estimation of the relative optically stimulated luminescence efficiency of an optical-fiber-based BaFBr:Eu detector for swift ions
AU - Hirata, Yuho
AU - Sato, Tatsuhiko
AU - Watanabe, Kenichi
AU - Ogawa, Tatsuhiko
AU - Parisi, Alessio
AU - Uritani, Akira
N1 - Score=10
PY - 2022
Y1 - 2022
N2 - The reliability of dose assessment with radiation detectors is an important feature in various fields, such as radiotherapy, radiation protection, and high-energy physics. However, many detectors irradiated by high linear energy transfer (LET) radiations exhibit decreased efficiency called the quenching effect. This quenching effect depends not only on the particle LET but also strongly on the ion species and its microscopic pattern of energy deposition. Recently, a computational method for estimating the relative efficiency of luminescence detectors has been proposed following the analysis of microdosimetric specific energy distributions simulated using the particle and heavy ion transport code system (PHITS). This study applied the model to estimate the relative optically stimulated luminescence (OSL) efficiency of BaFBr:Eu detectors. Additionally, we measured the luminescence intensity of BaFBr:Eu detectors exposed to 4He, 12C, and 20Ne ions to verify the calculated data. The model reproduced the experimental data in the cases of adopting a microdosimetric target diameter of approximately 30–50 nm. The calculated relative efficiency exhibits ion-species dependence in addition to LET. This result shows that the microdosimetric calculation from specific energy is a successful method for accurately understanding the results of OSL measurements with BaFBr:Eu detectors irradiated by various particles.
AB - The reliability of dose assessment with radiation detectors is an important feature in various fields, such as radiotherapy, radiation protection, and high-energy physics. However, many detectors irradiated by high linear energy transfer (LET) radiations exhibit decreased efficiency called the quenching effect. This quenching effect depends not only on the particle LET but also strongly on the ion species and its microscopic pattern of energy deposition. Recently, a computational method for estimating the relative efficiency of luminescence detectors has been proposed following the analysis of microdosimetric specific energy distributions simulated using the particle and heavy ion transport code system (PHITS). This study applied the model to estimate the relative optically stimulated luminescence (OSL) efficiency of BaFBr:Eu detectors. Additionally, we measured the luminescence intensity of BaFBr:Eu detectors exposed to 4He, 12C, and 20Ne ions to verify the calculated data. The model reproduced the experimental data in the cases of adopting a microdosimetric target diameter of approximately 30–50 nm. The calculated relative efficiency exhibits ion-species dependence in addition to LET. This result shows that the microdosimetric calculation from specific energy is a successful method for accurately understanding the results of OSL measurements with BaFBr:Eu detectors irradiated by various particles.
KW - Quenching effect
KW - Microdosimetry
KW - Optically Stimulated Luminescence
KW - Phits
UR - https://ecm.sckcen.be/OTCS/llisapi.dll/overview/52536509
U2 - 10.1080/00223131.2021.2017372
DO - 10.1080/00223131.2021.2017372
M3 - Article
SN - 1881-1248
VL - 59
SP - 915
EP - 924
JO - Journal of Nuclear Science and Technology
JF - Journal of Nuclear Science and Technology
IS - 7
ER -