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cosmic rays
cosmic-ray track
cosmic-ray track The interaction of ionizing cosmic rays (see
cosmic radiation) with mineral surfaces produces solid-state damage which, when etched with acid, is revealed as tracks of varying length. Most tracks are produced by iron group nucleii (nuclear charge (Z) 18–28, VH ions). Track lengths due to galactic cosmic rays may extend to depths of 20cm. In contrast,
solar flare tracks are mostly less than one millimetre in length. Track densities, typically about 10
12/m
2 on unshielded lunar mineral surfaces, provide a measure of
exposure age.
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Mysterious Cosmic Rays Linked to Galactic Powerhouse; Sources of High-Energy Particles Spread Unevenly Across the Sky.
News Wire article from: Ascribe Higher Education News Service; 11/8/2007; 700+ words
; ...The sprawling Auger Cosmic Ray Observatory in South...rain of high-energy cosmic rays that continually pelts...The age of cosmic-ray astronomy has arrived...exact sources of these cosmic rays and how they accelerate...
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Milagro Detects Cosmic Ray Hot Spots; Second Recent Study Indicating High-Energy Particle Acceleration 'Near' Earth.
News Wire article from: Ascribe Higher Education News Service; 11/24/2008; 700+ words
; ...the localized excesses of cosmic-ray protons observed with the Milagro observatory." Cosmic rays are actually charged particles...distribution of cosmic rays is not so uniform. When these high energy cosmic ray particles strike the Earth...
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Illuminating rays.(A Thin Cosmic Rain: Particles From Outer Space)(book)(Brief Article)(Review)
Magazine article from: Chemistry and Industry; 10/15/2001; ; 700+ words
; ...natural dose, comes from cosmic rays. Because their intensity...flight will give you a cosmic ray dose equivalent to your...attributed to high-energy rays hitting the retina or...Equally worrying, a cosmic ray passing through a silicon...
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 "Deseret News (Salt Lake City)")
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U. study confirms cosmic ray cutoff is real
Newspaper article from: Deseret News (Salt Lake City); 3/24/2008; ; 700+ words
; ...behavior of cosmic rays. The new research...1991 finding of a cosmic ray that supposedly carried...have been an ordinary cosmic ray distorted by atmospheric conditions. "Cosmic ray" is a misnomer. They're not rays like beams of light...
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Go to work on a cosmic ray
Newspaper article from: The Independent - London; 12/5/1995; 700+ words
; ...the latest twist in the cosmic ray plot, the detection...of extra-high energy rays. "The number one problem...these highest energy cosmic rays," he says. Professor...spent years studying cosmic rays with the Haverah Park...measure the high-energy ray directly. Instead...
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COPTER TO PLACE COSMIC RAY DETECTORS ON SOUTHWEST OF DELTA ON OCT. 19
News Wire article from: US Fed News Service, Including US State News; 10/16/2006; 700+ words
; ...ultrahigh-energy cosmic ray could hit your head, it...pitched baseball. Some cosmic rays come from stars that explode...numbers of ultrahigh-energy cosmic rays reaching Earth. Japan's AGASA cosmic ray observatory has detected...
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Los Alamos observatory fingers cosmic ray 'hot spots'.
Newspaper article from: NewsRx Science; 12/28/2008; 700+ words
; ...Laboratory cosmic-ray observatory has seen...with an excess of cosmic rays. The research calls...record enough cosmic-ray encounters to see...Dingus said. Because cosmic rays are charged particles...number of cosmic-ray events originating...highest hot ...
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Cosmic ray font: supernova remnants rev up ions.(This Week)
Magazine article from: Science News; 10/1/2005; ; 700+ words
; ...can accelerate electrons to cosmic ray energies, but electrons make up only about 10 percent of cosmic rays. Energetic ions, the main...remnants also produce cosmic ray ions, most of the cosmic rays that hit Earth could arise...
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Birth zone shrinks for top cosmic rays.(Brief Article)
Magazine article from: Science News; 8/15/1998; ; 700+ words
; ...energetic cosmic rays are exotic particles...million trillion eV--cosmic ray ever recorded (SN...for the most potent cosmic rays, says Alexander...highest energy cosmic rays each year, improving...to draw a bead on cosmic ray sources.
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Turning a fly's eye on energetic cosmic rays. (Fly's Eye detectors pick up high-energy cosmic rays)
Magazine article from: Science News; 12/4/1993; ; 700+ words
; ...high-energy cosmic rays come in two distinct...The detection of a cosmic ray with an energy of...ever recorded for a cosmic ray - also suggests that these rays can't be relics...universe. Because a cosmic ray loses energy through...
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Cosmic Ray
Encyclopedia entry from: UXL Encyclopedia of Science
Cosmic ray Cosmic rays are invisible, highly energetic particles of matter reaching Earth from all directions in space. Physicists divide cosmic rays into two categories: primary and secondary. Primary cosmic rays...
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Cosmic Rays
Book article from: Space Sciences
Cosmic Rays Cosmic rays are, in fact, not rays...of space weather. Incoming galactic cosmic rays are scattered on magnetic irregularities...solar modulation" of the galactic cosmic ray spectrum. At low energies, many of...
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cosmic rays
Book article from: The Columbia Encyclopedia, Sixth Edition
...energy of the primary ray, which may be as...accelerator; however, cosmic rays of lower energy predominate...but the origin of cosmic rays remains a mystery...result is a gamma ray that can be traced...ray detectors; a ray can strike a single...surrounding ones. ...
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cosmic-ray shower
Book article from: A Dictionary of Astronomy
cosmic-ray shower The cascade of secondary particles and photons produced when a primary cosmic ray enters the Earth's atmosphere and collides...shower or an Auger shower . The secondary cosmic rays are initially pions . Neutral pions decay...
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cosmic-ray track
Book article from: A Dictionary of Earth Sciences
cosmic-ray track The interaction of ionizing cosmic rays (see cosmic radiation ) with mineral surfaces produces solid-state damage which, when etched with acid, is revealed as tracks of varying length. Most tracks are produced by iron group...
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