Physics
- Materials Science
X Rays to Go: Carbon nanotubes could shrink machines
A new type of X-ray machine operates at room temperature by producing X-ray-generating electrons with carbon nanotubes instead of traditional heated metal filaments.
- Physics
Twice-charmed particles spotted?
Exotic cousins of protons and neutrons known as doubly-charmed baryons may have made their laboratory debut.
- Materials Science
Spring in your step? The forces in cartilage
Researchers are uncovering the role of molecular forces in cartilage's ability to resist compression.
- Physics
Double or Nothing
The hunt for a rare, hypothetical nuclear transformation known as neutrinoless double-beta decay may answer one of the most urgent questions in physics today: How much do elementary particles called neutrinos weigh?
- Physics
U.S. time now flows from atom fountain
The United States has switched to the atomic fountain clock, which sets itself according to the resonant frequency of rising and falling balls of cold cesium.
- Physics
Magnets trap neutrons for a lifetime
A new device that uses magnets to trap neutrons may enable physicists to measure more precisely how quickly free neutrons decay, a time period with implications for understanding both the weak force and the early universe.
- Physics
Lasers act on cue in electron billiards
Electrons torn from atoms by a laser beam can shoot back into the atom and knock loose other electrons like balls in a billiard game, a finding that may have applications in nuclear fusion, particle acceleration, and fundamental physics experiments.
- Physics
Super Conductors
Materials that conduct electricity without resistance are known as superconductors. Explore the basic physics and potential applications of these fascinating materials at the American Physical Society’s Physics Central Web site. Go to: http://www.physicscentral.com/action/action-01-3.html
- Materials Science
Wiregate: Metallic picket fence flips magnetic bits
Rather than relegate magnetic fields to the usual backup role of data storage for computers, a new microcircuit exploits those fields for computation, possibly leading to cheaper, lower-power chips than traditional electronic ones.
- Physics
Voyager spacecraft still buffeted by sun
Even though the two Voyager probes launched in 1977 passed the outermost planets in our solar system more than a decade ago, their sensors show that they can't yet outrun the influence of solar flares.
- Physics
Old data yield new signs of extra force
Several experimental findings that conflict with predictions of the prevailing standard model of particle physics suggest that nature may include another force beyond the four known ones.
- Physics
Catch a Wave
Detection of gravitational waves predicted by Einstein's 1916 general theory of relativity may finally occur, thanks to a new generation of laser-based observatories.
