Monte Carlo simulation of the electron transport through thin slabs: A comparative study of penelope, geant3, geant4, egsnrc and mcnpx

Vilches, M.; García-Pareja, S.; Guerrero, Rafael; Anguiano, M.; Lallena, A. M.

doi:10.1016/j.nimb.2006.11.061

Cited by 30 publications

(19 citation statements)

References 13 publications

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“…29 For the water region the optimized G4EmDNAPhysics models of the DNA-extension 30 were used. A representative kinetic energy distribution was extracted for the water depth of 500 mm.…”

Section: Electron Scattering Simulationsmentioning

confidence: 99%

DNA protection by ectoine from ionizing radiation: molecular mechanisms

Hahn

Meyer

Schröter

et al. 2017

Phys. Chem. Chem. Phys.

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Ectoine, a compatible solute and osmolyte, is known to be an effective protectant of biomolecules and whole cells against heating, freezing and extreme salinity. Protection of cells (human keratinocytes) by ectoine against ultraviolet radiation has also been reported by various authors, although the underlying mechanism is not yet understood. We present the first electron irradiation of DNA in a fully aqueous environment in the presence of ectoine and at high salt concentrations. The results demonstrate effective protection of DNA by ectoine against the induction of single-strand breaks by ionizing radiation. The effect is explained by an increase in low-energy electron scattering at the enhanced freevibrational density of states of water due to ectoine, as well as the use of ectoine as an OH-radical scavenger. This was demonstrated by Raman spectroscopy and electron paramagnetic resonance (EPR).

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“…29 For the water region the optimized G4EmDNAPhysics models of the DNA-extension 30 were used. A representative kinetic energy distribution was extracted for the water depth of 500 mm.…”

Section: Electron Scattering Simulationsmentioning

confidence: 99%

DNA protection by ectoine from ionizing radiation: molecular mechanisms

Hahn

Meyer

Schröter

et al. 2017

Phys. Chem. Chem. Phys.

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“…Perhaps the most accurate data are those of Hanson et al 6 for 15.7 MeV electrons. Their data have been compared to the predictions of the EGS4 Monte Carlo code by Li and Rogers 7 and to several other popular codes by Vilches et al [8][9][10] Additional data for electrons have been reported by Kulchitsky …”

Section: Introductionmentioning

confidence: 98%

“…The recent articles by Vilches et al [8][9][10] compare the results of several Monte Carlo codes to the best experimental data. Their work shows that the different codes predict differences of more than 20% for the widths of the scatter distributions and the authors stress the need for additional experimental data.…”

Section: Introductionmentioning

confidence: 99%

“…15͒ Monte Carlo codes are widely used for studying problems in medical physics. The simulation of electron multiple scattering in EGS4 is based on the multiple scattering theory of Molière. The approximations inherent in Molière's theory have been extensively studied by several authors, including Bethe, The recent articles by Vilches et al [8][9][10] compare the results of several Monte Carlo codes to the best experimental data. Their work shows that the different codes predict differences of more than 20% for the widths of the scatter distributions and the authors stress the need for additional experimental data.…”

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confidence: 99%

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Measurement of multiple scattering of 13 and electrons by thin foils

et al. 2008

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To model the transport of electrons through material requires knowledge of how the electrons lose energy and scatter. Theoretical models are used to describe electron energy loss and scatter and these models are supported by a limited amount of measured data. The purpose of this work was to obtain additional data that can be used to test models of electron scattering. Measurements were carried out using 13 and 20 MeV pencil beams of electrons produced by the National Research Council of Canada research accelerator. The electron fluence was measured at several angular positions from 0°to 9°for scattering foils of different thicknesses and with atomic numbers ranging from 4 to 79. The angle, 1/e , at which the fluence has decreased to 1 / e of its value on the central axis was used to characterize the distributions. Measured values of 1/e ranged from 1.5°to 8°with a typical uncertainty of about 1%. Distributions calculated using the EGSnrc Monte Carlo code were compared to the measured distributions. In general, the calculated distributions are narrower than the measured ones. Typically, the difference between the measured and calculated values of 1/e is about 1.5%, with the maximum difference being 4%. The measured and calculated distributions are related through a simple scaling of the angle, indicating that they have the same shape. No significant trends with atomic number were observed.

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“…While a range of approaches exist [1][2][3], the Schiff [4] formula for the angular distribution of bremsstrahlung radiation is still widely employed, for instance in Monte Carlo radiation transport codes such as egsnrc [5,6], egs5 [7] and geant4 [8][9][10]. Its utility is, however, much broader because it is analytically soluble and does not require numeric methods such as Monte Carlo.…”

Section: Introductionmentioning

confidence: 99%