نتایج جستجو برای: geant4 code

تعداد نتایج: 168902  

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

به منظور اعتبارسنجی ابزار geant4 شبیه سازی تولید پایون باردار بررسی شد. برهمکنش انتخابی گاما-پروتون است. پس از اجرا در برهمکنش گاما-پروتون نتایج بدست آمده برای زاویه های بزرگ با داده های آزمایش مطابقت دارد ولی در زاویه های کوچک نتایج شبیه سازی با داده های تجربی تفاوت معنی داری را نشان می دهد

2014
Alexander Broberg Skeltved Nikolai Østgaard Brant Carlson Thomas Gjesteland Sebastien Celestin

This paper presents the first study that uses the GEometry ANd Tracking 4 (GEANT4) toolkit to do quantitative comparisons with other modeling results related to the production of terrestrial gamma ray flashes and high-energy particle emission from thunderstorms. We will study the relativistic runaway electron avalanche (RREA) and the relativistic feedback process, as well as the production of b...

Journal: :Physics in medicine and biology 2011
L Maigne Y Perrot D R Schaart D Donnarieix V Breton

The GATE Monte Carlo simulation platform based on the GEANT4 toolkit has come into widespread use for simulating positron emission tomography (PET) and single photon emission computed tomography (SPECT) imaging devices. Here, we explore its use for calculating electron dose distributions in water. Mono-energetic electron dose point kernels and pencil beam kernels in water are calculated for dif...

Journal: :Journal of Instrumentation 2022

The MUon RAdiography of VESuvius (MURAVES) project aims at the study summital cone Mt. Vesuvius, an active volcano near Naples (Italy), by measuring its density profile through muon flux attenuation. Its data, combined with those from gravimetric and seismic measurement campaigns, will be used for better defining volcanic plug bottom crater. We report on development end-to-end simulation framew...

Journal: :Nuclear Instruments and Methods in Physics Research 2022

An accurate description of interactions between thermal neutrons (below 4 eV) and materials is key to simulate the transport in a wide range applications such as criticality-safety, reactor physics, compact accelerator-driven neutron sources, radiological shielding or nuclear instrumentation, just name few. While Monte Carlo code Geant4 was initially developed particle physics experiments, %-wi...

Journal: :Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology 2010
D Sardari R Maleki H Samavat A Esmaeeli

Radiation therapy is an established method of cancer treatment. New technologies in cancer radiotherapy need a more accurate computation of the dose delivered in the radiotherapy treatment plan. This study presents some results of a Geant4-based application for simulation of the absorbed dose distribution given by a medical linear accelerator (LINAC). The LINAC geometry is accurately described ...

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

geant4 یک نرم افزار قدرتمند شبیه سازی برهم کنش های ذرات بنیادی است. این نرم افزار مراحل تکمیل و توسعه خود را طی می کند. زیرروال های متعدد آن در حال تست و تصحیح و تکمیل هستند. در این پایان نامه شبیه سازی پراکندگی پرتو ایکس با انرژی mev 10 و 8 از مانع سربی با هدف اعتبارسنجی geant4 صورت گرفته است. به همین منظور داده هایی که از آزمایش شبیه سازی شده توسط geant4 بدست آمده است را، با داده های تجربی ...

ژورنال: سنجش و ایمنی پرتو 2019

This study proposes a method to estimate RBE of fast neutrons using Monte Carlo simulations. This approach is based on the combination of an atomic resolution DNA geometrical model and Monte Carlo simulations for tracking particles. Atomic positions were extracted from the Protein Data Bank. The GEANT4 code was used for tracking the secondary particles generated by fast neutrons during their in...

2015
Maria-Ana POPOVICI Romeo IONICA Gheorghe CATA-DANIL Maria-Ana Popovici Romeo Ionica Gheorghe Cata-Danil

This paper is a continuation of the preliminary dosimetric evaluation of source terms at PW laser systems [1] the proton case. The main acceleration mechanisms and the associated characteristics of the accelerated proton beams were briefly presented. FLUKA and GEANT4 Monte Carlo transport codes were used to compute absorbed doses due to three proton beams of well defined energy and spatial dist...

2009
M. BONESINI

The HARP experiment at the CERN Proton Synchroton has collected data for hadroproduction measurements with a large set of targets, ranging from hydrogen to lead, in the momentum range 3.0-15 GeV/c, covering an extended angular range (0.025 ≤ θ ≤ 2.15 rad) with a redundant particle identification. Obtained results may be used for the tuning of neutrino beamline simulations, going from convention...

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