News tagged with positrons
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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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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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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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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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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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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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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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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Enzyme necessary for development of healthy immune system
Mice without the deoxycytidine kinase (dCK) enzyme have defects in their adaptive immune system, producing very low levels of both T and B lymphocytes, the major players involved in immune response, according to a study by ...
Medicine & Health / Medical research
Dec 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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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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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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Raman nanoparticle-aided imaging of tumors moves closer to human trials
(PhysOrg.com) -- In 2008, a team of investigators at Stanford University's Center for Cancer Nanotechnology Excellence demonstrated that they could use a technique known as nanoparticle-aided Raman spectroscopy to look at ...
Nanotechnology / Bio & Medicine
Jun 28, 2011 |
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FDA clears Siemens' 2-in-1 medical scanner
(AP) -- The Food and Drug Administration says it has cleared the first medical imaging device to simultaneously perform two powerful scans used to diagnose a wide variety of diseases and ailments.
Medicine & Health / Medications
Jun 10, 2011 |
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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.
