نتایج جستجو برای: mcnpx code
تعداد نتایج: 168222 فیلتر نتایج به سال:
Background: Hadron therapy for malignant tumor is becoming increasingly popular. There are many factors which effect on implementation of a proper treatment planning. The purpose of this work is to investigate the inhomogeneity effects as affecting factor on proton range, Full width at half maximum (FWHM) and 20% position of penumbra (P20) by MCNPX code. Materials and Methods: An inhomogeneous ...
In this paper, we describe the performance of the Los Alamos spallation-driven solid-deuterium ultra-cold neutron (UCN) source. Measurements of the cold neutron flux, the very low energy neutron production rate, and the UCN rates and density at the exit from the biological shield are presented and compared to Monte Carlo predictions. The cold neutron rates compare well with predictions from the...
The research deals with a spectrometry of neutron field based on the p(20)+Be source reaction. interaction stands for nuclear reaction where protons accelerated to energy 20 MeV bombard Be target. Produced has broad distribution up 18 MeV. was carried out at Nuclear Physics Institute Czech Academy Sciences and motivated by extension experimental possibilities NG-2 target station. To determine s...
The most recent release of photonuclear interaction data for Monte Carlo applications is the ENDF/B-VII library. While this current version offers several improvements over its predecessors, it does not address the observed, sometimes quite significant variance in the measured data. For instance, for U, the cross-section data in the ENDF/B-VII library is consistently larger than all measurement...
The Supercritical-Water-Cooled Reactor (SCWR) is the Generation IV reactor concept most closely related to current light water reactors (LWRs). The SCWR builds on the vast experience with today’s LWRs and supercritical coal-fired power plants. Water at supercritical state is used as moderator and coolant, and reaches a temperature of about 500 ◦C at the core outlet, which enables a much higher ...
Monte Carlo simulations are widely used for calculation of the dosimetric parameters of brachytherapy sources. MCNP4C2, MCNP5, MCNPX, EGS4, EGSnrc, PTRAN, and GEANT4 are among the most commonly used codes in this field. Each of these codes utilizes a cross-sectional library for the purpose of simulating different elements and materials with complex chemical compositions. The accuracies of the f...
This study used MCNPX code to investigate the brachytherapy (192)Ir dose distributions in water, bone, and lung tissue and performed radiophotoluminescent glass dosimeter measurements to verify the obtained MCNPX results. The results showed that the dose-rate constant, radial dose function, and anisotropy function in water were highly consistent with data in the literature. However, the lung do...
a Department of physics, faculty of science, Takestan Branch, Islamic Azad University,Takestan, IRAN. b Engineering Department, Shahid Beheshti University, G.C., P.O. Box 1983963113, Tehran, IRAN. ________________________________________________________________________________________ Abstract: Absorption dose distribution of onion powder in electron irradiation system has been numerically inve...
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