non-polar molecule
non-polar molecule A molecule in which the electrons are shared equally between the nuclei. As a result, the distribution of charge is even and the force of attraction between different molecules is small. Non-polar molecules show little reactivity.
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X-Ray Imaging Physics for Nuclear Medicine Technologists. Part 1: Basic Principles of X-Ray Production*
Magazine article from: Journal of Nuclear Medicine Technology; 9/1/2004; ; 700+ words
; ...good understanding of x-ray imaging physics and basic CT scanner operation...the first article on x-ray production, the nuclear...characteristics of x-rays relative to other electromagnetic...radiations, including -y-rays in terms of energy, wavelength...b) methods of x-ray ...
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Probe bares heart of X-ray inferno.(Physics)(Brief Article)
Magazine article from: Science News; 1/8/2005; ; 618 words
; ...gets compressed and emits the X rays. Sandia's Daniel B. Sinars...have now plucked from Z's X-ray deluge a grainy record of those...was to pipe in additional X rays from outside the machine that...overwhelm or destroy the X-ray detector. Sinars says that...last November at a plasma-physics ...
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X-Ray Imaging Physics for Nuclear Medicine Technologists. Part 2: X-Ray Interactions and Image Formation*
Magazine article from: Journal of Nuclear Medicine Technology; 3/1/2005; ; 700+ words
; ...Technol 2005; 33:3-18 Diagnostic x-ray imaging relies on the attenuation of x-rays in the patient, where the transmitted x-ray beam is detected and produces a 2-dimensional...represent the primary radiation. X-ray attenuation (removal of x-rays by absorption and scattering) within...
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 "The Economist (US)")
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Cosmic rays: down-to-earth physics. (technology behind particle physics) (Science and Technology)
Magazine article from: The Economist (US); 1/21/1989; 700+ words
; ...Cosmic rays Down-to-earth physics IN ORDER to do particle physics...biggest accelarators, cosmic rays ought to interest particle physicists too. Most cosmic rays are made of charged particles...energetic as those seen in cosmic rays requires a celestial particle...s atmosphere. The ...
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Demonstration of X-ray laser process "close at hand" according to Princeton Plasma Physics Laboratory scientists.
PR Newswire; 10/29/1984; 700+ words
; ...demonstration of the X-ray laser process is close...scientists at Princeton Plasma Physics Laboratory (PPPL) announced...Princeton to develop the X-ray laser as a diagnostic...Suckewer studied plasma physics at Moscow University under...University. The PPPL X-ray laser work was primarily...
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Armenia's Physics Institute Active in Study of Cosmic Rays
Newspaper article from: Armenian Reporter, The; 2/26/2000; ; 700+ words
; ...02-26-2000 Armenia's Physics Institute Active in Study of Cosmic Rays The Cosmic Ray Division (CRD) of the Yerevan...The director of the Cosmic Ray Division, Dr. Ashot Chilingaryan...working at the two Cosmic Ray stations (one at NorAmberd...
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The Physics of Radiotherapy X-Rays And Electrons.(Brief article)(Book review)
Magazine article from: Radiologic Technology; 3/1/2008; ; 675 words
; THE PHYSICS OF RADIOTHERAPY X-RAYS AND ELECTRONS. Metcalfe P, Kron T...titled The Physics of Radiotherapy X-Rays from Linear Accelerators, and is well...programs. The Physics of Radiotherapy X-Rays and Electrons also is a comprehensive...
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High energy gamma-ray astronomy; proceedings. (CD-ROM included).(PHYSICS)(Brief Article)(Book Review)
Magazine article from: SciTech Book News; 6/1/2005; 572 words
; ...American Institute of Physics, [c]2005 885 p...with high-energy gamma ray astronomy, with several...origin of galactic cosmic rays, the highest-energy cosmic rays, cosmic rays and gamma radiation from...of galaxies, gamma-ray blazars, non-thermal...
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The Physics of Radiotherapy X-Rays and Electrons.(Brief article)(Book review)
Magazine article from: Radiologic Technology; 3/1/2008; ; 671 words
; THE PHYSICS OF RADIOTHERAPY X-RAYS AND ELECTRONS. Metcalfe P, Kron T...titled The Physics of Radiotherapy X-Rays from Linear Accelerators, and is well...programs. The Physics of Radiotherapy X-Rays and Electrons also is a comprehensive...
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The physics of radiotherapy x-rays and electrons.(Brief Article)(Book Review)
Magazine article from: SciTech Book News; 12/1/2007; 508 words
; 9781930524361 The physics of radiotherapy x-rays and electrons. Metcalfe...interaction properties of X-rays and electrons, dosimetry...calibration of megavoltage X-rays and electrons, and properties of X-ray and electron beams. Clinical...
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ray
Book article from: The Columbia Encyclopedia, Sixth Edition
ray in physics, term denoting the straight line along which light or other form of radiation is propagated from its...electrons emitted from a cathode or particles emitted by substances exhibiting radioactivity . See cosmic rays ; X ray .
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Cosmic Rays
Book article from: Space Sciences
...unstable mesons produced by cosmic rays impinging on the upper atmosphere...frame to decay. Although cosmic rays have been known for more than...increased understanding of nuclear physics, that the "radiation" was...weather. Incoming galactic cosmic rays are scattered on magnetic ...
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X-rays
Book article from: The Oxford Companion to the Body
...xF6;ntgen, Professor of Physics in Wurzburg, Bavaria, accidentally discovered X-rays in November 1895 while studying cathode rays in a low pressure gas discharge...in the path of the invisible rays which he was investigating...screen, he made the first X-ray photograph — of his...
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Hansen, William Webster
Dictionary entry from: Complete Dictionary of Scientific Biography
...California, 23 May 1949) physics, microwave electronics . Encouraged...electrical engineering and later physics, in which he received the doctorate with a dissertation on X-ray excitation (1933). After...electrons for experiments in X-ray physics, eschewing large static...
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Cerenkov Effect
Encyclopedia entry from: The Gale Encyclopedia of Science
...all three scientists received the Nobel prize in physics in 1958. The electric field of a fast-moving charged...the properties of Cerenkov radiation in high energy physics and cosmic ray physics observations. Since the radiation is only emitted...
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