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Helium radiation diffusion in prominences
Solar Physics, 1982The following is shown on the basis of a solution of the integral diffusion equations for radiation in a multilevel helium atom under low-temperature plasma conditions (Te = 7000 K) in the ‘Vertical slab’ model: (a) Neutral helium is ionized by coronal radiation mainly in the 100–300 A spectral region; the degree of helium ionization is maximum at the ...
N. A. Yakovkin +2 more
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Fuzzy Modelling of Diffuse Solar Radiation
2017Modelling the diffuse solar radiation is a topic in many scientific and research papers, but most of the presented models are conventional, approximate and constrained to a certain geographic region, lacking the universality. Furthermore, many of these mathematical models are polynomials of appropriate degree, and/or consist of a set of expressions ...
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Radiation of diffuse isothermal cavities
Journal of Engineering Physics, 1973General equations are derived for the emissivity distribution over the surface, the angular characteristic of the emissivity, and the hemispherical emissivity of diffuse isothermal cavities.
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Diffusion of radiation in planetary atmospheres
Earth, Moon, and Planets, 1994The problem of interaction of the solar radiation with the turbid Earth atmosphere, containing complicated polydispersive aerosol systems, is discussed in this paper. Equations for computing the angular functions ofn-th order scattering are derived.
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Annual Review of Astronomy and Astrophysics, 1973
The most reliable measurements in the energy range from 0.1 MeV to 100 MeV are presented in graphs. Studies in the region from 1 keV to 100 keV are discussed, giving attention to nonthermal mechanisms, thermal emission from a uniform intergalactic medium, the contribution of discrete extragalactic sources to the isotropic X-ray background, discrete ...
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The most reliable measurements in the energy range from 0.1 MeV to 100 MeV are presented in graphs. Studies in the region from 1 keV to 100 keV are discussed, giving attention to nonthermal mechanisms, thermal emission from a uniform intergalactic medium, the contribution of discrete extragalactic sources to the isotropic X-ray background, discrete ...
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Diffuse solar ultraviolet radiation.
International ophthalmology clinics, 2005The solar UV exposure to the eyes of humans is due to the direct and diffuse components of solar radiation. The direct ocular UV exposures to the eyes are reduced due to the natural aversion of the majority of people from looking directly at the sun. The diffuse UV is incident from all directions and as a result, it is more difficult to minimise the ...
Parisi, Alfio, Turnbull, David J.
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Radiation-enhanced diffusion of phosphorus in silicon
2018Modeling of the phosphorus radiation-enhanced diffusion in the course of implantation of high-energy protons into an elevated-temperature silicon substrate and during its treatment in a hydrogen-containing plasma was carried out. It follows from the results obtained that the radiation-enhanced diffusion occurs by means of formation, migration, and ...
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Radiation in a Diffusing Medium
Journal of the Optical Society of America, 1946openaire +2 more sources