Geant4 based Monte Carlo simulation for verifying the modified sum-peak method.

The modified sum-peak method can practically estimate radioactivity by using solely the peak and the sum peak count rate. In order to efficiently verify the method in various experimental conditions, a Geant4 based Monte Carlo simulation for a high-purity germanium detector system was applied. The energy spectra in the detector were simulated for a Co point source in various source to detector distances.

Verification of biological dose calculation for carbon ion therapy with a monte carlo method.

We developed a calculation technique to evaluate the biological dose distribution of heavy ion beams, and verified its reliability by comparison with experimental results. The calculation technique was developed by connecting two general-purpose Monte Carlo codes. In order to evaluate the radiation quality and biological effect, the microdosimetric kinetic model was adopted.