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Developing new radiotherapy techniques using linac based gamma radiation sources
(2007-12-01)
A major challenge in cancer radiotherapy is to deliver a lethal dose of radiation to the target volume while minimizing damage to the surrounding normal tissue. We have proposed a model on how treatment efficacy might be ...
Monte Carlo simulation applied in total reflection X-ray fluorescence: Preliminary results
(2013-05-20)
The X-ray Fluorescence (XRF) analysis is a technique for the qualitative and quantitative determination of chemical constituents in a sample. This method is based on detection of the characteristic radiation intensities ...
Weight vector estimation of circular arrays of antennas using Artificial Neural Networks
(2008-12-01)
This paper presents a model for the control of the radiation pattern of a circular array of antennas, shaping it to address the radiation beam in the direction of the user, in order to reduce the transmitted power and to ...
Escape depth of secondary electrons from electron-irradiated polymers
(1992-08-01)
Measurements on polymers (Teflon FEP and Mylar) have shown that the secondary electron emission from uncharged surfaces exceeds that from surfaces containing a positive surface charge. The reduced emission of charged ...
Similarities and dissimilarities of thermoluminescence induced by γ-rays, UV light, β-rays and proton beam in several silicate minerals.
(Sociedade Brasileira de Pesquisas em Materiais.Campos do Jordão, 2013-09-29)
It is generally assumed that when an ionic crystals is irradiated with an ionizing radiation,
electrons from Valence Band (VB) receive enough energy to be raised to Conduction Band
(CB), being subsequently capture by ...
Monte Carlo and analytical calculation of lateral deflection of proton beams in homogeneous targets
(2010-08-26)
Proton radiation therapy is a precise form of radiation therapy, but the avoidance of damage to critical normal tissues and the prevention of geographical tumor misses require accurate knowledge of the dose delivered to ...
Side-lobe level reduction in 1D photonic array antennas
(Ieee, 2018-01-01)
Photonic array antennas have been proposed to improve radiation features and to enable dynamic beam steering and beam forming. In CMOS-compatible photonic array antennas, fabrication constraints, however, limit the minimum ...
Side-lobe level reduction in 1D photonic array antennas
(2019-01-11)
Photonic array antennas have been proposed to improve radiation features and to enable dynamic beam steering and beam forming. In CMOS-compatible photonic array antennas, fabrication constraints, however, limit the minimum ...