Abstract
Here, we report on the measurement of scintillation responses of scintillation fibers for precision dose verification in proton therapy. A detector equipped with two layers of 1-mm-thick scintillation fibers and 46-channel silicon photodiodes was constructed and tested with 45-MeV proton beams provided by the MC50 proton cyclotron at the Korea Institute of Radiological and Medical Science (KIRAMS). Scintillation responses of the detector for the protons were measured as a function of depth in an absorber made of PMMA (poly methyl methacrylate) and PET (polyester) films whose thicknesses varied from 0.148 to 2.0 g·cm -2. Quenching of the scintillation responses of the detector was evaluated by comparison of the data to the specific energy loss predicted by GEANT4-based simulations. The first-order parameter of the Birks model, kB, for scintillation fibers, as derived from the ratios of specific energy losses to scintillation responses, was (2.38 ± 0.17) × 10 -2.
Original language | English |
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Pages (from-to) | 725-730 |
Number of pages | 6 |
Journal | Journal of the Korean Physical Society |
Volume | 60 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2012 Mar |
Keywords
- Birks-model kB parameter
- Dose verification
- GEANT4
- Proton therapy
- Scintillation fibers
ASJC Scopus subject areas
- Physics and Astronomy(all)