نتایج جستجو برای: geant4 dna

تعداد نتایج: 508519  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1390

چکیده پیشرفت نسخه های جدید نرم افزار geant4 در شبیه سازی آشکارسازها، بررسی ترابرد ذرات و فرایندهای ذرات بنیادی به موازات جریان اعتبار سنجی مدل های فیزیکی آن در برابر داده های تجربی صورت می گیرد. هدف این پایان نامه بررسی اعتبار کلاسg4photonuclearprocess همراه با مدل الکترومغناطیسی استاندارد emstandardoption3 موجود در geant4 می باشد. در چیدمان تجربی پرتوی فوتونی حاصل از بتاترون با انرژی mev23 ...

2003
V. Ivanchenko

A Geant4 hadronic process verification suite has been designed to test and optimize Geant4 hadronic models in the cascade energy range. It focuses on quantities relevant to the LHC radiation environment and spallation source targets. The general structure of the suite is presented, including the user interface, stages of verification, management of experimental data, event generation, and compa...

Journal: :Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics 2010
Nabil Zahra Thibault Frisson Loic Grevillot Philippe Lautesse David Sarrut

The aim of this work was to study the influence of Geant4 parameters on dose distribution and computational time for simulations of carbon ion therapy. The study was done using Geant4 version 9.0. The dose distribution in water for incident monoenergetic carbon ion beams of 300 MeV/u were compared for different values of secondary particle production threshold and different step limits. Variati...

2010
Vladimir UZHINSKY

New features are added to the Fritiof model implemented in Geant4: a simulation of elastic hadron-nucleon scatterings; a simulation of binary reactions like NN→N∆ in hadron-nucleon interactions; a separate simulation of single diffractive and non-diffractive events; the reggeon theory inspired model of nuclear destruction (RTIM) and the algorithm of “Fermi motion” simulation in nuclear reaction...

Journal: :Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2004
P Rodrigues A Trindade L Peralta C Alves A Chaves M C Lopes

In this paper, we present a novel implementation of a dose calculation application, based on the GEANT4 Monte Carlo toolkit. Validation studies were performed with an homogeneous water phantom and an Alderson-Rando anthropomorphic phantom both irradiated with high-energy photon beams produced by a clinical linear accelerator. As input, this tool requires computer tomography images for automatic...

Journal: :CoRR 2012
John Allison Laurent Garnier Akinori Kimura Joseph Perl

From the beginning the Geant4 Visualisation System was designed to support several simultaneous graphics systems written to common abstract interfaces. Today it has matured into a powerful diagnostic and presentational tool. It comes with a library of models that may be added to the current scene and which include the representation of the Geant4 geometry hierarchy, simulated trajectories and u...

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