نتایج جستجو برای: neutron method

تعداد نتایج: 1672345  

ژورنال: سنجش و ایمنی پرتو 2020

The present study deals with a new method for measuring the power of a reactor. This method uses gamma and neutron radiation resulted from the entire reactor structure, without changing its structure (online). In terms of functionality, this method can measure the reactor power in real-time and report it instantly. In order to obtain the relationship between reactor power and gamma and neutron ...

Journal: :iranian journal of radiation research 0
j.g. fantidis department of electrical engineering, kavala institute of technology, greece e. saitioti department of electrical engineering, kavala institute of technology, greece d.v. bandekas department of electrical engineering, kavala institute of technology, greece n. vordos department of electrical engineering, kavala institute of technology, greece

background: boron neutron capture therapy (bnct) is a very promising treatment for patients suffering gliobastoma multiforme, an aggressive type of brain cancer, where conventional radiation therapies fail. thermal neutrons are suitable for the direct treatment of cancers which are located at near-tissue-surface deep-seated tumors need harder, epithermal neutron energy spectra. materials and me...

D. Rezaei Ochbelagh, H. Miri Hakimabad, R. Izadi Najafabadi,

Background: Several landmine detection methods, based on nuclear techniques, have been suggested during the recent years. Neutron energy moderation, neutron-induced gamma emission, neutron and gamma attenuation, and fast neutron backscattering are nuclear-based methods used for landmine detection. The aim of this study is to use backscattered neutron for landmine detection. Materials ...

ژورنال: سنجش و ایمنی پرتو 2018

The neutron collision cross-section is important in neutron use for a specific job, such as neutron therapy or even in nuclear reactors. In calculating computational codes such as MCNP, only information from the neutron-to-mass collision information contained in the computational code library is used, in the case of nanoscale particles in contrast to the mass of materials and / or particulate m...

F. Rahmani, H Khalafi, S.M. Abtahi, S.M.R. Aghamiri,

Background: The aim of this work was to establish how well gel dosimeters performed, as substitutes for brain tissue compared with standard phantom materials such as water, polymethyl-methacrylate (or PMMA), A150 plastic and TE- liquid phantom material for dosimetry of neutron beams in boron neutron capture therapy. Materials and Methods: Thermal neutron fluence, photon dose and epithermal neu...

Journal: :Radiation protection dosimetry 2015
S D Monk T Abram M J Joyce

Here, the characterisation of the high-energy neutron field at TRIUMF (The Tri Universities Meson Facility, Vancouver, British Columbia) with Monte Carlo simulation software is described. The package used is MCNPX version 2.6.0, with the neutron fluence rate determined at three locations within the TRIUMF Thermal Neutron Facility (TNF), including the exit of the neutron channel where users of t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند 1388

چکیده ندارد.

Journal: :Radiological physics and technology 2015
Genichiro Wakabayashi Akihiro Nohtomi Eriko Yahiro Toshioh Fujibuchi Junichi Fukunaga Yoshiyuki Umezu Yasuhiko Nakamura Katsumasa Nakamura Makoto Hosono Tetsuo Itoh

The applicability of the activation of an NaI scintillator for neutron monitoring at a clinical linac was investigated experimentally. Thermal neutron fluence rates are derived by measurement of the I-128 activity generated in an NaI scintillator irradiated by neutrons; β-rays from I-128 are detected efficiently by the NaI scintillator. In order to verify the validity of this method for neutron...

Journal: :iranian journal of radiation research 0
jacob g. fantidis department of electrical engineering, eastern macedonia and thrace institute of technology, greece

background: monte carlo simulations play a vital role in the calculation of the necessary shielding both for neutrons and photons. advanced and simple shielding materials against neutron and gamma rays were compared by simulation using the mcnb4b monte carlo code. the simulations were carried out for the three common neutron sources, namely the 252cf, the 241am/be and the dd neutron generator w...

Bonner spheres system is one of the ways of measuring neutron energy distribution which is often applied in spectrometry and neutron dosimetry. This system includes a thermal neutron detector, being located in the center of several polyethylene spheres, and it is still workable due to the isotropic response of the system which in turn is derived from the spherical symmetry of moderators and the...

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