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Keyword: electrons

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  • Fermilab is 'ecstatic' over first NOvA neutrino results

    08/07/2015 11:20:05 AM PDT · by BenLurkin · 9 replies
    wm.edu ^ | August 7, 2015 | Joseph McClain |
    Neutrinos are unimaginably numerous, but their infrequent interaction with matter make the particles a challenge to study. Neutrinos exist in three “flavors:” muon, electron and tau. The NOvA experiment aims to investigate one of the peculiar properties of neutrinos — their tendency to change flavors, or oscillate. NOvA is what the physicists call a long-baseline experiment, as the neutrinos travel more than 500 miles underground. “We make a beam of muon-type neutrinos at Fermilab, and then we detect those at Ash River, Minnesota,” Vahle explained. “We are looking for muon-type neutrinos to change into electron-type neutrinos. We also look for...
  • Quantum mechanics flummoxes physicists again

    07/24/2010 5:35:11 PM PDT · by LibWhacker · 82 replies · 3+ views
    Nature ^ | 7/22/10 | Jon Cartwright
    A fresh take on a classic experiment makes no progress in unifying quantum mechanics and relativity. If you ever want to get your head around the riddle that is quantum mechanics, look no further than the double-slit experiment. This shows, with perfect simplicity, how just watching a wave or a particle can change its behaviour. The idea is so unpalatable to physicists that they have spent decades trying to find new ways to test it. The latest such attempt, by physicists in Europe and Canada, used a three-slit version — but quantum mechanics won out again. In the standard double-slit...
  • Electron Filmed for First Time

    02/26/2008 1:59:29 AM PST · by grey_whiskers · 68 replies · 208+ views
    Live Science.com via Yahoo! News ^ | 2-25-2008 | LiveScience Staff
    Scientists have filmed an electron in motion for the first time, using a new technique that will allow researchers to study the tiny particle's movements directly. Previously it was impossible to photograph electrons because of their extreme speediness, so scientists had to rely on more indirect methods. These methods could only measure the effect of an electron's movement, whereas the new technique can capture the entire event. Extremely short flashes of light are necessary to capture an electron in motion. A technology developed within the last few years can generate short pulses of intense laser light, called attosecond pulses, to...
  • Killer Electrons From Outer Space

    09/07/2007 6:07:30 AM PDT · by blam · 11 replies · 530+ views
    Spectrum ^ | 8-31-2007 | Saswato R Das
    Killer Electrons From Outer Space By Saswato R. Das Accurate space-weather forecasts could come from knowing the cause of superfast electrons in the Van Allen belts Image: NASA Glenn Research Center 31 August 2007—Researchers at Los Alamos National Laboratory, in New Mexico, say they have solved the mystery of satellite-zapping “killer electrons” that are sometimes produced in Earth’s outer atmosphere. These highly energetic electrons—strong enough to damage electronics and human tissue—pose a danger to spacecraft, satellites, and astronauts. For many years, the mechanism by which they are produced has remained little understood, in spite of physicists’ attempts at solving this...
  • Team Finds Magnetic Islands Are Source of Mysterious High Speed Electrons

    10/05/2006 3:02:36 PM PDT · by Fred Nerks · 24 replies · 797+ views
    PhysOrg.com ^ | October 04, 2006 | website
    A team of scientists led by University of Maryland physics professor James Drake appear to have solved a key remaining mystery about how the interaction of magnetic fields produce the explosive releases of energy seen in solar flares, storms in the Earth’s magnetosphere and many other powerful cosmic events. In recent years, researchers have answered many questions about this process, but one thing they have been unable to explain is data from solar observing satellites indicating that up to half of the energy released during solar flares is in the form of energetic electrons. Large numbers of these low-mass particles...