نتایج جستجو برای: neutron radiography

تعداد نتایج: 65281  

Journal: :Musikforschung der Hochschule der Künste Bern 2023

Neutron imaging is a non-destructive testing method that functions according to principles similar X-ray imaging. In contrast X-rays, neutrons can generally penetrate metals rather well, but at the same time they have high sensitivity for hydrogen. This makes neutron – which includes radiography (investigations in 2D) as well tomography (3D) an ideal studying impact of playing historical brass ...

Journal: :basic and clinical cancer research 0
hoda darestani 1nuclear engineering department, science and research unit, azad university, tehran, i.r. iran hassan ali nedaie radiotherapy oncology department, cancer institute, tehran university of medical sciences, tehran, i.r. iran azim arbabi radiation oncology department, imam hussein medical center, faculty of medicine, shahid beheshti university of medical sciences, tehran, i.r. iran kheirollah mohammadi nuclear engineering department, amirkabir industrial university, tehran, i.r. iran mahmood allahverdi radiotherapy oncology department, cancer institute, tehran university of medical sciences, tehran, i.r. iran arjang shahvar agricultural, medical and industrial research school, karaj, i.r. iran

background : in spite of clinically useful photon and electron beams, high energy linacs produce secondary particles such as neutrons (photo-neutron production). neutrons have important roles during treatment with high energy photons in terms of protection and dose escalation. in this project, neutron dose equivalent of 18 mv varian accelerators is calculated by tld600 and tld700. materials and...

Journal: :iranian journal of radiation research 0
h.r. vega-carrillo unidad académica de estudios nucleares, universidad autonoma de zacatecas, zacatecas, zac. méxico r. barquero departamento de radiología del hospital universitario rio hortega, valladolid, spain g.a. mercado unidad academica de matematicas universidad autónoma de zacatecas, zacatecas, zac. méxico

background: in high-intensity, mixed and pulsed neutron fields the use of spectrometers or area monitors with active detectors is useless in these conditions neutron measuring devices must have a passive detector. here a passive neutron area monitor with cr39 track detector was designed and the response was calculated. materials and methods: the response of a passive neutron area monitor with c...

2005
K.W.D. Ledingham

Laser induced beams of protons, neutrons and gamma rays using short pulse lasers is currently important principally because of the potential applications e.g. isotope production, transmutation studies, laser induced fission, heavy ion fusion reactions, neutron production and radiography, fast ignitor and spallation studies of neutrons. Although the Strathclyde group in collaboration with teams ...

1995
P. J. Bryant

The use of synchrotrons for pulsed neutron spallation sources is an example of spin-off from the accelerator development prompted by particle physics. The first proposal for an accelerator-driven source with a thermalised neutron facility was in the 1960s (Intense Neutron Generator, ING) [1], but this project was never built. There was earlier work on 'electrical' breeders [2] and the direct bo...

2012
Jakobus W. HOFFMAN Frikkie C. DE BEER

The South African National Centre for Radiography and Tomography (SANCRAT), located at Necsa, strives to be leaders in utilizing ionizing radiation as imaging probes in research and development as part of the South African National System of Innovation. The centre already encompasses a Neutron Radiography and Tomography facility (SANRAD) as well as a High Energy X-ray facility (HEXRAD). Recentl...

صالحی, روح اله, طاهری, محمد, عبداله زاده, مسعود, قاسمی, عباس,

  Background : Performing successful BNCT experiments needs a suitable neutron source. Important factors of the neutron beam are flux and energy that are very important in the selection of neutron source. In most centers that use this method for treatment, reactor is a neutron source, which according to characteristics of the reactor appropriated neutrons are very high. High cost of constructin...

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