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Showing 1 to 20 of 77 for “"Geant4"”.
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Introduction and application of GEANT4: A comparison of depth-dose
Geometry ANd Tracking 4 (GEANT4) is an object-oriented C++ based program that uses Monte Carlo methods to simulate the passage of particles through matter. A powerful application, GEANT4, allows the user to define variables such as material geometry, particle tracking, and detector physics. The …
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Developments and benchmarking applications for Grasshopper : a Geant4 based physics simulation tool
… untrained users to adapt into their projects. Geant4 is one such toolkit that is used widely by physicists in radiology, fission reactor work, and space irradiation studies among many other fields. As it happens, Geant4 and related programming libraries are not the default program to install …
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A Computationally Efficient Moment-Preserving Monte Carlo Electron Transport Method with Implementation in Geant4
… with the class II CH method utilized in the Geant4 standard electromagnetic physics list. Ultimately, the MP is shown to be accurate, efficient, versatile, and simple to implement and maintain.
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GEANT4-based model and experimental validation of positronium lifetime in organic and inorganic materials
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Comparing water to DNA for simulation of Auger electron direct damage to DNA using Geant4
… A chromatin ber was constructed within the Geant4 simulation toolkit down to the molecular level. The Binary Encounter Bethe (BEB) model for electron impact ionization was added to the Geant4 Toolkit so the cross sections of molecules could be more accurately modeled. Validation was …
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Low-dose imaging of liver diseases through neutron stimulated emission computed tomography: Simulations in GEANT4
<p>Neutron stimulated emission computed tomography (NSECT) is a non-invasive, tomographic imaging technique with the ability to locate and quantify elemental concentration in a tissue sample. Previous studies have shown that NSECT has the ability to differentiate between benign and malignant tissue …
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Reproducing the line-shape of a Doppler-broadened Gamma-line in 10Be following the beta-decay of 11Li using Geant4
… implementation exists for simulating DSAM in Geant4 (G4), despite being a widely-used simulation framework and often considered the golden standard for simulating nuclear and high energy physics. This document demonstrated an implementation of DSAM in G4. The key additions to G4 were an …
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A GEANT4 simulation of the recoil proton stopping acceptance in the near-threshold γ p [right arrow] [pi]⁰p reaction on a scintillator target
… carried out using the new state-of-the-art CERN GEANT4 toolkit. The photo-production cross-section was generated to be uniform in cos OCM and OcM- Incident photons with energy uniformly distributed in the range of 150MeV to 250MeV were used. The simulation focused on the effects of the size of …
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A Geant4 Simulation Study Of A Xenon-Doped Liquid Argon, Full-Body, Time-of-Flight Positron Emission Tomography Scanner To Understand Its Performance And Noise Profile
… This design was simulated using the Geant4 particle-matter monte carlo simulation tool-kit while following the National Electrical Manufacturers Association’s evaluation tests (2018) for performance assessment. The results presented here highlight a 20-fold increase in sensitivity …
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TOF-based diagnostics system development and Geant4 simulation of the ELIMED transport and dosimetry beam line for high energy laser-driven ion beam applications @ ELI Beamlines
… The present thesis describes the Monte Carlo Geant4-based application, simulating the complete ELIMED beam line, in terms of geometry as well as magnetic and electric fields. Realistic top-to-bottom simulations have been performed to predict beam parameters and optimize dose distributions at …
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Simulated liquid argon interactions with neutrons
The GEANT4 physics simulation program is known to have errors in how hadronic interactions are implemented. This has the potential to cause errors in the Monte Carlos used to determine the expected neutron backgrounds in the MiniCLEAN single phase liquid argon WIMP detector. Elastic and inelastic …
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Monte Carlo Simulations of Novel Scintillator Detectors and Dosimetry Calculations
… cancer cells, has been evaluated by the MC code GEANT4. The simulations estimate the average energy deposition/per event in the biological samples. The development of prototypes for medical imaging, based on LaBr3:Ce scintillation crystals coupled with a position sensitive photomultiplier, have …
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Monte Carlo calculation and analysis of neutron and gamma fields at spallation neutron sources for simulating cosmic radiation
… for accelerated single event effect testing. Geant4 (GEometry ANd Tracking version 4) toolkit, using Monte Carlo method, was used to simulate a preliminary model of spallation neutron source at LANSCE (ICE House, WNR) and TSL (ANITA) for understanding physical mechanisms of neutron and gamma …
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Γεωμετρική προσέγγιση ανακατασκευής μέσω τριπλής σύμπτωσης στην πολυφωτονική απεικόνιση τύπου PET
… των προσομοιώσεων και την ανάλυση των δεδομένων, GEANT4/GATE, PAW. Στο Κεφάλαιο 7 παρουσιάζεται όλη η διαδικασία που ακολουθήθηκε προς την ανάπτυξη και εφαρμογή του αλγορίθμου ανακατασκευής. Αναλυτικότερα, στην ενότητα 7.1 περιγράφεται η κινηματική μελέτη της διάσπασης του ortho-Positronium, μέσω …
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Imaging the ionization track of alpha recoils for the directional detection of weapons grade plutonium
… with probability-based rate calculations and Geant4 simulation rates. The detector, in its current configuration agrees well with the expected rates, showing a 95% track reconstruction efficiency, computed from both the probability-based rate calculation and the Geant4 simulation rates. …
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Monte Carlo simulations, in vitro and in vivo experimental verifications for preclinical studies
… has been fulfilled by developing a Monte Carlo GEANT4-based application reproducing the experimental setup used in preclinical in vivo experiment and implementing the target within the simulation framework through its DICOM micro-CT images. - The role of an innovative radiosensitizing molecule …
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Monte-Carlo simulations of positron emission tomography based on liquid xenon detectors
… had been examined. Monte-Carlo simulations using GEANT4 were performed and the results were used to study the expected performance of a small animal PET scanner in comparison with a simulated conventional small animal scanner (LSO Focus 120). A NEMA-like cylinder phantom and an image contrast …
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Monte Carol simulation of the OLYMPUS experiment
… To accomplish this, a simulation using the GEANT4 library and reconstruction code was written and studies were performed. This paper serves to document the software written and its use in understanding the experiment and some systematic uncertainties.
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Reduction of Radiation Produced in Ion Implantation Devices, and Measurement of Some Relevant Cross-Sections
… modeling efforts to create simulation tools in Geant4 which can accurately predict dose rates on the Axcelis VXE LT. Existing physics tools for modeling nuclear reactions have been shown to produce non-physical results at incident particle energies of 1 - 2 MeV, as these tools are frequently …
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