نتایج جستجو برای: gamma irradiations
تعداد نتایج: 123589 فیلتر نتایج به سال:
Microflow photochemistry: UVC-induced [2 + 2]-photoadditions to furanone in a microcapillary reactor
[2 + 2]-Cycloadditions of cyclopentene and 2,3-dimethylbut-2-ene to furanone were investigated under continuous-flow conditions. Irradiations were conducted in a FEP-microcapillary module which was placed in a Rayonet chamber photoreactor equipped with low wattage UVC-lamps. Conversion rates and isolated yields were compared to analogue batch reactions in a quartz test tube. In all cases examin...
Experimental cross section measurements for the 176 Hf(n,2n) 175 Hf and 174 173 reactions were carried out, using activation technique. The neutron beam energy in range of 15.3-20.3 MeV was produced via 3 H(d,n) 4 He reaction at 5.5 Tandem Van de Graaf accelerator laboratory NCSR “Demokritos”. A thin metallic foil natural used, while determination flux target position, reference foils Al placed...
Defect depth profiles for self ion and He Irradiated gold arc obtained from single and multiple scatter dechanneling analysis in single crystal gold films. Quantitative defect densities are obtained through use of atomic scattering cross sections. Integral damage profiles are extracted from the dechanneling spectra and subsequently differentiated to yield the volume concentration of defects as ...
PURPOSE To design, construct, and evaluate an anthropomorphic phantom for evaluation of intensity-modulated radiation therapy (IMRT) dose planning and delivery, for protocols developed by the Radiation Therapy Oncology Group (RTOG) and other cooperative groups. METHODS AND MATERIALS The phantom was constructed from a plastic head-shaped shell and water-equivalent plastics. Internal structures...
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