نتایج جستجو برای: beam irradiation
تعداد نتایج: 172743 فیلتر نتایج به سال:
Introduction At the experimental heavy ion therapy facility at the GSI Darmstadt the in-beam PET scanner BASTEI is operated for quality assurance monitoring simultaneously to the therapeutic irradiation [1-3]. Due to the relatively short irradiation time, low number of positron emitters production rate and limited-angle geometry in-beam PET data are characterized by very low counting statistics...
The 250kW TRIGA Mark II research reactor, Vienna, is equipped with experimental facilities inside and outside the reactor core. Outside the core, there are four beam tubes (three radial and one tangential beam tube), a thermal column and a neutron radiography collimator, supplying neutrons for irradiation experiments. These experiments include neutron radiography, neutron tomography, neutron ac...
The thermoluminescence (TL) and EPR spectra of nanostructured compacts monoclinic ZrO 2 irradiated by three types irradiation have been studied: impulse flow 130 keV electrons, beam 10 MeV as well a 220 Xe ion beam. Irradiation samples with electrons ions leads to the formation F + centers in them. Thermal destruction these is observed temperature range 375–550 K for electron-irradiated 500– 70...
This study was conducted to compare the effects of two forms of radiation (electron and X-ray; generated by an electron beam accelerator) on the conformation and antigenic properties of hen's egg albumin, ovalbumin (OVA), which was used as a model protein. OVA solutions (2.0 mg/mL) were individually irradiated by electron beam or X-ray at the absorbed doses of 0 (control), 2, 4, 6, 8, and 10 kG...
The survival, OER, and RBE for HeLa, leukemia, and kidney cells after irradiation with 14 MeV neutrons, pion beams, and heavy ion beams dispersed by ridge filters are calculated. Simple beam models and the delta-ray theory of cellular survival are used in the calculations, which refer to a mixed radiation environment and the potential application of these irradiation systems in radiotherapy.
As all the mushrooms, Amanita species experiment several conservation problems, with a post-harvest life limited to a few days. Drying is one of the most used methods in mushrooms preservation. Food irradiation is another possible way to improve food quality and insure its security. Among the emerging irradiation technologies, electron beam has wide application, allowing high throughput, wide f...
The study of irradiation-induced defects on the nanoscale is crucial for a fundamental understanding of displacement and implantation damage in various microstructures. Ion irradiation performed in situ inside of a TEM is a unique tool allowing direct observation of defect evolution on nanometer length scales in real time [1]. Most facilities use a single ion beam, but in many real radiation en...
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