نتایج جستجو برای: low energy electrons multicellular model geant4 dna
تعداد نتایج: 4003989 فیلتر نتایج به سال:
In-beam gamma-ray and electron spectroscopy have been widely used as tools to study the broad variety of phenomena in nuclear structure. The SPEDE spectrometer is a new device to be used in conjunction with the MINIBALL germanium detector array to enable the detection of internal conversion electrons in coincidence with gamma rays from de-exciting nuclei in radioactive ion beam experiments at t...
Abstract Purpose. The purpose of this work is to investigate the feasibility TOPAS-nBio for track structure simulations using tuple scoring and ROOT/Python-based post-processing. Materials methods. There are several example applications implemented in GEANT4-DNA demonstrating simulations. These examples not by default TOPAS-nBio. In study, scorer was used re-simulate these examples. contained i...
Excess charge deposited on gas-phase thymine (T) and uracil (U) by resonant attachment of low-energy (0–3 eV) electrons induces the loss of hydrogen, which exclusively takes place from the N positions. This bond selectivity can be made site selective by properly adjusting the electron energy. While electrons at 1 eV result in loss of hydrogen from N1, the reaction can be switched to loss of hyd...
The specific absorbed fraction (SAF) of energy is an essential element of internal dose assessment. Here reported a set of SAFs calculated for selected organs of a human voxel-based phantom. The Monte Carlo transport code GATE version 6.1 was used to simulate monoenergetic photons and electrons with energies ranging from 10 keV to 2 MeV. The particles were emitted from three source organs: kidn...
This paper demonstrates the impact of pre-chemical stage, especially dissociation scheme and associated probabilities, on water radiolysis simulation using Geant4-DNA Monte Carlo track structure toolkit. The models parameters provided by TRACs have been collected implemented into Geant4-DNA. In order to evaluate their influence simulation, radiochemical yields (G-values) are evaluated as a func...
We elaborate our theoretical framework to treat low-energy electron scattering from helical macromolecules. A model of simple scatterers organized into a helical structure is proposed with application to base-pair arrangements in DNA. We extend our analysis to A-type DNA as well as nonperiodic arrangements in B-type DNA. Diffraction patterns due to base-pair spacing are observed under all condi...
Background: The total yields of direct Single-Strand Breaks (SSBs) and Double-Strand Breaks (DSBs) in proton energies varying from 0.1 to 40 MeV were calculated. While other studies in this field have not used protons with energy less than 0.5 MeV, our results show interesting and complicated behavior of these protons. Materials and Methods: The simulation has been done using the Geant4-DNA too...
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