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Transport of Resonance Radiation
Radiation Research, 1974It has long been recognized (1-3) that resonance states play an important role in determining the fate of energy deposited in inert gases by fast charged particles. Resonance states compete effectively in importance with metastable states because of their large oscillator strengths (and hence large initial yield) and because of the imprisonment of ...
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Radiation Transport Simulations
1995The theory and numerical methods discussed in the preceding chapters for radiative heat transfer will now be illustrated with the help of three examples. In the first case, we consider an idealized RTP reactor in order to focus on some numerical questions and determine the effectiveness of quasi-Monte Carlo methods.
Alfred Kersch, William J. Morokoff
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Enhanced transport via Kirchhoff radiation
Physics of Plasmas, 1998Momentum transfer via Kirchhoff radiation of electrostatic electron and ion-cyclotron-harmonic waves contributes an enhanced collisionality far in excess of that given by the Fokker-Planck term in the existing neoclassical models. The resultant particle and thermal transport resembles the observed anomalous transport in ohmically heated toroidal ...
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A space radiation transport method development
Advances in Space Research, 2004Improved spacecraft shield design requires early entry of radiation constraints into the design process to maximize performance and minimize costs. As a result, we have been investigating high-speed computational procedures to allow shield analysis from the preliminary design concepts to the final design.
J W, Wilson +7 more
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Radiation Transport in a Radiotherapy Room
Health Physics, 1995The photoneutron dose equivalent in a linac radiotherapy room and its entrance maze was investigated by means of Monte Carlo simulations under different conditions. Particularly, the effect of neutron absorbers and moderator layers placed on the maze walls was considered.
GIULINI CASTIGLIONI AGOSTEO, STEFANO LUIGI MARIA +5 more
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A Transportable Radiation Monitor
Journal of Scientific Instruments, 1950An instrument is described which has been designed to detect and measure small amounts of radiation such as may arise from radioactive contamination on benches, clothing or chemical glassware. Although primarily designed as a radiation health monitor, it is capable of measuring the counting rate due to alpha-, beta- or gamma-activity with an accuracy ...
K Kandiah, M O Deighton
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Relativistic radiation transport in dispersive media
Physical Review D, 1985A general-relativistic radiative transfer equation in an isotropic, weakly absorbing, nonmagnetized dispersive medium is derived using the kinetic-theoretical approach and the relativistic Hamiltonian theory of geometrical optics in those media. It yields the generally accepted classical equation in the special-relativistic approximation and in ...
, Kichenassamy, , Krikorian
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1986
In the previous chapters we have discussed the interaction of electromagnetic radiation with matter, using two essentially different concepts. In one concept, the medium was globally described by a phenomenological quantity of Maxwell’s macroscopic picture of the material, e.g. the permittivity ɛ of the sub-surface medium in the case of wave scattering
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In the previous chapters we have discussed the interaction of electromagnetic radiation with matter, using two essentially different concepts. In one concept, the medium was globally described by a phenomenological quantity of Maxwell’s macroscopic picture of the material, e.g. the permittivity ɛ of the sub-surface medium in the case of wave scattering
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Radiation transport calculations in treatment planning
Computerized Medical Imaging and Graphics, 1989This article reviews the role of radiation transport calculations in radiotherapy dose computation. The physical and mathematical principles underlying transport theory, as applied to electrons and photons, are discussed. Practical methods of solving the transport equation, with emphasis on Monte Carlo techniques, are reviewed.
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1992
The theory of electromagnetic radiation was first derived by James Clerk Maxwell in 1873. He showed that both magnetic and electric fields propagate in space and the velocity of propagation, from purely magnetic and electrical measurements, was very nearly 3 × 108 m/s.
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The theory of electromagnetic radiation was first derived by James Clerk Maxwell in 1873. He showed that both magnetic and electric fields propagate in space and the velocity of propagation, from purely magnetic and electrical measurements, was very nearly 3 × 108 m/s.
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