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- Title
MICRODOSIMETRY OF THE FULL SLOWING DOWN OF PROTONS USING MONTE CARLO TRACK STRUCTURE SIMULATIONS.
- Authors
Liamsuwan, T.; Uehara, S.; Nikjoo, H.
- Abstract
The article investigates two approaches in microdosimetric calculations based on Monte Carlo track structure (MCTS) simulations of a 160-MeV proton beam. In the first approach, microdosimetric parameters of the proton beam were obtained using the weighted sum of proton energy distributions and microdosimetric parameters of proton track segments (TSMs). In the second approach, phase spaces of energy depositions obtained using MCTS simulations in the full slowing down (FSD) mode were used for the microdosimetric calculations. Targets of interest were water cylinders of 2.3-100 nm in diameters and heights. Frequency-averaged lineal energies (¯yF ) obtained using both approaches agreed within the statistical uncertainties. Discrepancies beyond this level were observed for dose-averaged lineal energies (¯yD) towards the Bragg peak region due to the small number of proton energies used in the TSM approach and different energy deposition patterns in the TSM and FSD of protons.
- Subjects
MICRODOSIMETRY; MONTE Carlo method; PROTON beams; RADIATION dosimetry; LINEAR energy transfer
- Publication
Radiation Protection Dosimetry, 2015, Vol 166, p29
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncv204