Much research is being conducted on position-sensitive scintillation detectors for medical imaging, particularly for emission tomography. Monte Carlo simulations play an essential role in many of these research activities. As the scintillation process, the transport of scintillation photons through the crystal(s), and the conversion of these photons into electronic signals each have a major inf...

In the present work, alpha particles detection efficiency of polycarbonate detector (PC) is calculated using Geant4 simulation toolkit. A PC with 250 µm thickness and dimension 2.5 × cm2 considered. Assuming passage an 241Am source through brass collimators different lengths, various energies ranging from 0.2 to MeV are modeled. Also, etching layer 6 related a given electrochemical process as w...

A typical problem associated to Monte Carlo developments and application consists in the validation of the simulation models and results against experimental data. A novel software toolkit has been developed encompassing an ample variety of statistical algorithms for the comparison of data distributions, such as Monte Carlo simulations and experimental data. The toolkit contains a variety of go...

Crews working on present-day jet aircraft are a large occupationally exposed group with a relatively high average effective dose from galactic cosmic radiation. Crews of future high-speed commercial flying at higher altitudes would be even more exposed. To help reduce the significant uncertainties in calculations of such exposures, the male adult voxels phantom MAX, developed in the Nuclear Ene...

This work presents an application case study. Geant4 is a 750,000 line toolkit first designed in the mid-1990s and originally intended only for sequential computation. Intel’s promise of an 80-core CPU meant that Geant4 users would have to struggle in the future with 80 processes on one CPU chip, each one having a gigabyte memory footprint. Thread parallelism would be desirable. A semiautomatic...

Mean glandular dose (MGD) is the main dosimetric quantity in mammography. MGD evaluation is obtained by multiplying the entrance skin air kerma (ESAK) by normalized glandular dose (DgN) coefficients. While ESAK is an empirical quantity, DgN coefficients can only be estimated with Monte Carlo (MC) methods. Thus, a MC parameters benchmark is needed for effectively evaluating DgN coefficients. GEA...

Recently the number of hadron therapy facilities has been increasing rapidly. Some of them are designed for heavy ions and need a tool to simulate the passage of ions through matter. As well, the space engineering field requires good estimates of device damage caused by bombarding ions in cosmic rays. As a result, demands for detailed simulations of nucleus-nucleus interactions have increased. ...

ID: 14824 Title: Yields of positron-emitting nuclei (10C, 11C, and 15O) induced by protons and carbon ions: a simulation study with Geant4 Yields of positron-emitting nuclei ( 10 C, 11 C, and 15 O) induced by protons and carbon ions: a simulation study with Geant4 Introduction: Beams of protons and carbon ions are used in particle therapy for conformal irradiation of a tumor while sparing surro...