pp. 1455-1464
S&M1439 Research Paper of Special Issue https://doi.org/10.18494/SAM.2017.1626 Published: October 18, 2017 Particle Dependence of Quenching Effect in an Optical-Fiber-Type Optically Stimulated Luminescence Dosimeter [PDF] Yuho Hirata, Kenichi Watanabe, Sachiko Yoshihashi, Akira Uritani, Yusuke Koba, Naruhiro Matsufuji, Takayuki Yanagida, Toshiyuki Toshito, and Kentaro Fukuda (Received April 7, 2017; Accepted August 21, 2017) Keywords: dosimeter, heavy ion radiotherapy, optically stimulated luminescence, optical fiber probe, quenching phenomena
To monitor an actual dose in a patient's body during radiotherapy treatment, we have developed a small-size dosimeter of an optical fiber probe mounting optically stimulated luminescence (OSL) materials at the tip. The OSL materials show a quenching effect when they are irradiated by charged particles with high linear energy transfer (LET). We evaluate the particle dependence on the quenching effect in the small-size OSL dosimeter probe. Eu:BaFBr and Ce:CaF2 were adopted as OSL materials, and two types of small-size dosimeter were fabricated. We irradiated 290 MeV/u carbon ions, 150 MeV/u helium ions, and 225 MeV protons and measured the Bragg peak. The Eu:BaFBr small-size dosimeter showed the quenching effect in these three types of particle irradiation. The Ce:CaF2 small-size dosimeter showed the quenching effect only in carbon ion irradiation. The luminescence efficiencies of Eu:BaFBr were compared among these three charged particles. The quenching effect of Eu:BaFBr is independent of the irradiated particles.
Corresponding author: Yuho Hirata![]() Cite this article Yuho Hirata, Kenichi Watanabe, Sachiko Yoshihashi, Akira Uritani, Yusuke Koba, Naruhiro Matsufuji, Takayuki Yanagida, Toshiyuki Toshito, and Kentaro Fukuda, Particle Dependence of Quenching Effect in an Optical-Fiber-Type Optically Stimulated Luminescence Dosimeter, Sens. Mater., Vol. 29, No. 10, 2017, p. 1455-1464. |