ASSESSING THE CONTRIBUTION OF CROSS-SECTIONS TO THE UNCERTAINTY OF MONTE CARLO CALCULATIONS IN MICRO- AND NANODOSIMETRY
| Autor: | Heidi Nettelbeck, B. Heide, Marie-Claude Bordage, Carmen Villagrasa, M. Bueno, E. Gargioni, Hans Rabus, S. Chiriotti, Alessio Parisi, M.U. Bug |
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| Rok vydání: | 2018 |
| Předmět: |
Computer science
Monte Carlo method Electrons Tracking (particle physics) Electron source Particle transport 030218 nuclear medicine & medical imaging Iodine Radioisotopes 03 medical and health sciences 0302 clinical medicine Dosimetry Computer Simulation Radiology Nuclear Medicine and imaging Statistical physics Radiometry Task group Models Statistical Radiation Physical model Radiological and Ultrasound Technology Uncertainty Public Health Environmental and Occupational Health General Medicine Models Theoretical Europe 030220 oncology & carcinogenesis Cluster size Monte Carlo Method Software |
| Zdroj: | Radiation Protection Dosimetry. 183:11-16 |
| ISSN: | 1742-3406 0144-8420 |
| DOI: | 10.1093/rpd/ncy240 |
| Popis: | Within EURADOS Working Group 6 'Computational Dosimetry', the micro and nanodosimetry task group 6.2 has recently conducted a Monte Carlo (MC) exercise open to participants around the world. The aim of this exercise is to quantify the contribution to the uncertainty of micro and nanodosimetric simulation results arising from the use of different electron-impact cross-sections, and hence physical models, employed by different MC codes (GEANT4-DNA, PENELOPE, MCNP6, FLUKA, NASIC and PHITS). Comparison of the participants' simulation results for both micro and nanodosimetric quantities using different MC codes was the first step of the exercise. The deviation between results is due to different cross-sections but also different tracking methods and particle transport cut-off energies. The second step of the exercise will involve using identical cross-section datasets to account only for the other variations in the first step, thus enabling the determination of the uncertainty contribution due to different cross-sections. This paper presents a comparison of the MC simulation results obtained in the first part of the exercise. For the microdosimetric simulations, particularly in the configuration where the electron source is contained within the micrometric target, the choice of MC code has a small influence on the results. For the nanodosimetric results, on the other hand, the mean ionisation cluster size distribution (ICSD) was sensitive to the physical models used in the MC codes. The ICSD was therefore chosen to study the influence of different cross-section data on the uncertainty of simulation results. |
| Databáze: | OpenAIRE |
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