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Encyclopedia > Particle radiation

Particle radiation is the radiation of energy by means of small fast-moving particles that have energy and mass. Radiation has a variety of different meanings. ... A subatomic particle is a particle smaller than an atom: it may be elementary or composite. ... Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ...


Particle radiation can be emitted from within an unstable atomic nucleus (radioactive decay) in the form of a positively charged Alpha particle (α), a positively or negatively charged (the latter being more common) Beta particle (β), or a neutron. Other forms of particle radiation include positrons and neutrinos. A stylized representation of a lithium atom. ... Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles (radiation). ... An alpha particle is deflected by a magnetic field Alpha particles or alpha rays (named after the first letter in the greek alphabet) are a form of particle radiation which are highly ionizing and have low penetration. ... Beta particles are high-energy electrons emitted by certain types of radioactive nuclei such as potassium-40. ... Properties In physics, the neutron is a subatomic particle with no net electric charge and a mass of 939. ... The first detection of the positron in 1932 by Carl D. Anderson The positron is the antiparticle or the antimatter counterpart of the electron. ... The neutrino is an elementary particle. ...


Cosmic rays are subatomic particles falling naturally on the Earth. Most originate in the Sun and are part of the solar wind. Cosmic rays can loosely be defined as energetic particles originating outside of the Earth. ... Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third-closest planet to the Sun. ... The Sun is the star at the centre of our Solar system. ... The plasma in the Solar Wind meeting the heliopause Ion storm redirects here. ...


Radiation is often separated into two categories, ionizing and non-ionizing, to denote the energy and danger of the radiation. Ionization is the process of removing electrons from atoms, leaving two electrically charged particles (an electron and a positively charged ion) behind. The negatively charged electrons and positively charged ions created by ionizing radiation may cause damage in living tissue. The term radioactivity generally refers to the release of ionizing radiation. ...


See also


  Results from FactBites:
 
Particle Radiation (621 words)
A third type, gamma radiation, is not a particle but rather a high-energy form of electromagnetic radiation.
Because neutrino radiation rates may be able to tell us about the nuclear reactions at the core of the Sun, scientists have gone to great lengths to try to devise detectors that sense these elusive particles.
There is a second main type of radiation, which deals with the transfer of energy by waves from vibrating electric and magnetic fields.
Particle radiation - TheBestLinks.com - Energy, Mass, Neutron, Nuclear physics, ... (212 words)
Particle radiation is the radiation of energy by means of small fast-moving particles that have energy and mass.
Particle radiation can be emitted from an unstable atomic nucleus (radioactive decay) in the form of a positively charged Alpha particle (α), a positively or negatively charged (the latter being more common) Beta particle(β)or a neutron.
Radiation is often separated into two categories, ionizing and non-ionizing, to denote the energy and danger of the radiation.
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