نتایج جستجو برای: incident beam 635 mev
تعداد نتایج: 173717 فیلتر نتایج به سال:
Introduction The use of cut-outs in electron applicators make changes on output, isodose, and percentage depth dose (PDD) curves. These changes and electron beam dose distribution in the form of three-dimensional (3D) can be measured by gel dosimeters. Materials and Methods Dosimetry was performed with and without a square shield (6×6 cm2 field). The energies were 4, 9, and 16 MeV and phantom w...
Dissociative adsorption of H2 from a high-flux supersonic molecular beam on flat and vicinal Si~001! surfaces was investigated by means of optical second harmonic generation ~SHG!. The initial sticking coefficients for terrace adsorption varied between 10 and 10. They revealed a strongly activated dissociation process, both with respect to the kinetic energy of the incident molecules (70 meV<Ek...
Silicon carbide (SiC) Schottky diodes 21 µm thick with small surfaces and high N-dopant concentration have been used to detect alpha particles and low energy light ions. In particular 12 C and 16 O beams at incident energies between 5 and 18 MeV were used. The diode active-region depletion-thickness, the linearity of the response, energy resolution and signal rise-time were measured for differe...
In order to probe neutron rich radioactive noble gases produced by photo-fission, a PARRNe1 experiment (Production d’Atomes Radioactifs Riches en Neutrons) has been carried out at CERN. The incident electron beam of 50 MeV was delivered by the LIL machine: LEP Injector Linac. The experiment allowed to compare under the same conditions two production methods of radioactive noble gases: fission i...
In order to probe neutron rich radioactive noble gases produced by photo-fission, a PARRNe-1 experiment (Production d Atomes Radioactifs Riches en Neutrons) has been carried out at CERN. The incident electron beam of 50 MeV was delivered by the LIL machine: LEP Injector Linac. The experiment allowed us to compare under the same conditions two production methods of radioactive noble gases: fissi...
Correlation functions, constructed from directional projections of the relative velocities of fragments, are used to determine the shape of the breakup volume in Preprint submitted to Elsevier 2 February 2008 coordinate space. For central collisions of Xe + Sn at 50 MeV per nucleon incident energy, measured with the 4π multi-detector INDRA at GSI, a prolate shape aligned along the beam directio...
Purpose: To investigate the energy dependence/spectral sensitivity of silicon diodes designed for small-field dosimetry and obtain response factors (RFs) for arbitrary photon spectra using Monte Carlo (MC) simulations. Methods: The EGSnrc user-code DOSRZnrc was used to calculate the dose deposition in water and in the active volume of a stereotactic diode f...
The present thesis is focused on the development and application of narrow scanned high energy photon beams for radiation therapy. The introduction of physically and biologically optimized intensity modulated radiation therapy (IMRT) requires a flexible and accurate dose delivery method to maximize the treatment outcome. Narrow scanned photon beams is a fast option for IMRT since it is not depe...
In an experiment performed with a high-intensity and high-energy laser system, $\ensuremath{\alpha}$-particle production in proton-boron reaction by using laser-driven proton beam was measured. $\ensuremath{\alpha}$ particles were observed from the front also rear side, even after 2-mm-thick boron target. The data obtained this have been analyzed sequence of numerical simulations. simulations c...
Data analysis of an experiment in which photon splitting in atomic fields was observed is presented. The experiment was performed at the tagged photon beam of the ROKK-1M facility at the VEPP-4M collider. In the energy region of 120-450 MeV, statistics of 1.6x10(9) photons incident on the BGO target was collected. About 400 candidate photon-splitting events were reconstructed. Within the attain...
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