cosmic ray

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cosmic ray

n.
A very rapidly moving particle of extraterrestrial origin, especially one that collides with the earth's atmosphere. Cosmic rays are mainly protons and alpha particles but sometimes are other light atomic nuclei and high-energy electrons.

cos′mic ray′


n.
a radiation of high penetrating power originating in outer space and consisting partly of high-energy atomic nuclei.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cosmic ray - highly penetrating ionizing radiation of extraterrestrial origin; consisting chiefly of protons and alpha particles; collision with atmospheric particles results in rays and particles of many kinds
ionizing radiation - high-energy radiation capable of producing ionization in substances through which it passes
cosmic radiation - radiation coming from outside the solar system
References in periodicals archive ?
It is believed that the upper limit of cosmic-ray energy is limited by a threshold of 5 x [10.sup.19] eV, because cosmic ray particles interact energetically with relic radiation, which leads to their absorption and reduction of their energy to a threshold value at distances of the order of several tens of megaparsecs (Greisen-Zatsepin-Kuzmin effect) [2,3].
Here, we wish to focus our attention on the important interplay between particle DM signatures and the background signals expected from astrophysics, discussing in particular the phenomenological relevance of cosmic-ray physics.
This isotope forms when cosmic rays smash apart atmospheric oxygen and nitrogen nuclei, so Earth must have undergone increased cosmic-ray bombardment when this layer of ice was deposited....
Some 60Fe in the debris from the destroyed star is accelerated to cosmic-ray speed when another nearby massive star in the cluster explodes and its shock wave collides with the remnants of the earlier stellar explosion.
The project will also foster critical and significant training to high-skilled personnel on the use of cosmic-ray soil moisture techniques in the UK.
London, Apr 10 ( ANI ): NASA has revealed that the bright light that features in a photo from the surface of Mars taken by its Curiosity rover is not some kind of luminous alien, but it is "likely a glinting rock or cosmic-ray hit".
ICRR installed its first x86 cluster system in January 1991 as a collaborative research environment for multiple projects in the field of particle physics and cosmic-ray research, conducted primarily by the University of Tokyo.
Bazilevskaya et al., "PAMELA measurements of cosmic-ray proton and helium spectra," Science, vol.
Role of the sun's nonaxisymmetric open flux in cosmic-ray modulation.
Galactic pions can be generated only by cosmic-ray collisions, so this peak would offer compelling proof, Dermer said.
The discovery was made using cosmic-ray imaging, a technique that uses subatomic particles to create a 3-D image of a structure.
To this end, we will study cosmic-ray propagation in magneto-hydrodynamic turbulence and improve the modeling of the plasma physics.