News tagged with positrons
Antihydrogen trapped for first time (w/ Video)
(PhysOrg.com) -- In the movie Angels and Demons, scientists have solved one of the most perplexing scientific problems: the capture and storage of antimatter. In real life, trapping atomic antimatter has never ...
Nov 17, 2010 |
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CERN scientists confine antihydrogen atoms for 1000 seconds
(PhysOrg.com) -- Seventeen minutes may not seem like much, but to physicists working on the Antihydrogen Laser Physics Apparatus (ALPHA) project at the CERN physics complex near Geneva, 1000 seconds is nearly ...
May 04, 2011 |
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New way to produce antimatter-containing atom discovered
(PhysOrg.com) -- Physicists at the University of California, Riverside report that they have discovered a new way to create positronium, an exotic and short-lived atom that could help answer what happened ...
Jul 11, 2011 |
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Astrophysicists cast doubt on link between excess positrons and dark matter
(PhysOrg.com) -- Astrophysicists are looking everywhere - inside the Large Hadron Collider, in deep mines and far out into space - for evidence of dark matter, which makes up about 25 percent of the energy density of the ...
Apr 16, 2010 |
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Fermi gamma-ray space telescope confirms puzzling preponderance of positrons
(PhysOrg.com) -- By finding a clever way to use the Earth itself as a scientific instrument, members of a SLAC-led research team turned the Fermi Gamma-ray Space Telescope into a positron detector – and ...
Sep 13, 2011 |
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Still in the dark about dark matter
Dark matter, the mysterious stuff thought to make up about 80 percent of matter in the universe, has become even more inscrutable.
Dec 06, 2011 |
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Integral satellite disproves dark matter origin for mystery radiation
(PhysOrg.com) -- A team of researchers working with data from ESA’s Integral gamma-ray observatory has disproved theories that some form of dark matter explains mysterious radiation in the Milky Way.
Jul 22, 2009 |
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Particles as tracers for the most massive explosions in the Milky Way
Astronomers recently observed a mysterious flux of particles in the universe, and the hope was born that this may be the first observation of the remnants of "dark matter". But scientists from the University ...
Aug 11, 2009 |
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Brightest gamma ray on Earth -- for a safer, healthier world
The brightest gamma ray beam ever created- more than a thousand billion times more brilliant than the sun- has been produced in research led at the University of Strathclyde- and could open up new possibilities ...
Sep 19, 2011 |
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Astrophysicists discover new heating source in cosmological structure formation
(Phys.org) -- So far, astrophysicists thought that super-massive black holes can only influence their immediate surroundings. A collaboration of scientists at the Heidelberg Institute for Theoretical Studies ...
May 15, 2012 |
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Belle discovers new heavy 'exotic hadrons'
(PhysOrg.com) -- Two unexpected new hadrons containing bottom quarks have been discovered by the Belle Experiment using the High Energy Accelerator Research Organization (KEK)'s B Factory (KEKB), a highly-luminous, ...
Jan 10, 2012 |
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A Flight Simulator for the World's Smallest Beam
(PhysOrg.com) -- Commissioning has begun at the Japan-based Accelerator Test Facility 2, a major technology test bed for future accelerators, including the proposed International Linear Collider, or ILC. During ...
Mar 31, 2009 |
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SuperB project moves forward, preparing for construction
The most elementary components of matter, quarks and leptons, have been found, as the result of 100 years of research, to be organized into three replicating "families". The reason for this specific number or organization ...
Oct 05, 2010 |
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AMS experiment embarks on first leg of mission into space
The Alpha Magnetic Spectrometer (AMS) left CERN this morning on the first leg of its journey to the International Space Station (ISS). A special convoy carrying the experiment is due to arrive at the European Space Agency’s ...
Space & Earth / Space Exploration
Feb 12, 2010 |
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Positron
The positron or antielectron is the antiparticle or the antimatter counterpart of the electron. The positron has an electric charge of +1e, a spin of ½, and has the same mass as an electron. When a low-energy positron collides with a low-energy electron, annihilation occurs, resulting in the production of two or more gamma ray photons (see electron-positron annihilation).
Positrons may be generated by positron emission radioactive decay (through weak interactions), or by pair production from a sufficiently energetic photon.
For more information about Positron, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
