Correction of quenching effect of a small size OSL dosimeter using Eu:BaFBr and Ce:CaF2

Yuho Hirata, Kenichi Watanabe, Akira Uritani, Atsushi Yamazaki, Yusuke Koba, Naruhiro Matsufuji, Takayuki Yanagida, Kentaro Fukuda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

To accurately estimate an actual dose during radiotherapy treatment, dosimeters are required to be inserted into the affected region in a patient's body. Therefore, we are developing a small size dosimeter consisting of optical fibers and optically stimulated luminescence (OSL) elements. We fabricated two types of small size dosimeters using Eu:BaFBr and Ce:CaF2. We measured the Bragg peak of high energy carbon ions in a water equivalent material. OSL materials showed the quenching effect when irradiated by high linear energy transfer (LET) particles. The sensitivity of Eu:BaFBr and Ce:CaF2 monotonically decreased with different coefficients. The ratio of the signal intensity of these two OSL materials can uniquely determine the sensitivity of each OSL material. We corrected the quenching effect of the OSL dosimeters in the spread out Bragg peak with this relationship.

Original languageEnglish
Pages (from-to)246-251
Number of pages6
JournalRadiation Measurements
Volume106
DOIs
Publication statusPublished - Nov 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Radiation
  • Instrumentation

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