Physics

Sieve holds nanoparticles and acts as solar absorber

A membrane consisting of polymer fibers and proteins makes a novel filter for tiny, nano-scaled particles in aqueous solutions.

NASA Seeks Public's Input On Improving Digital Communications

As its digital-communications team prepares for the next redesign of NASA.gov, NASA is asking the public for thoughts on what the agency should be doing on its website.

NASA Hosts Nov. 29 News Conference About Mercury Polar Regions

NASA will host a news conference at 2 p.m. EST on Thursday, Nov, 29, to reveal new observations from the first spacecraft to orbit the planet Mercury.

NASA Seeks Public's Input On Improving Digital Communications

As its digital-communications team prepares for the next redesign of NASA.gov, NASA is asking the public for thoughts on what the agency should be doing on its website.

NASA, Roscosmos Assign Veteran Crew to Year-Long Space Station Mission

NASA, the Russian Federal Space Agency (Roscosmos), and their international partners have selected two veteran spacefarers for a one-year mission aboard the International Space Station in 2015.

Record ionization: X-ray laser removes more than two shells from electron cloud surrounding noble gas atoms

(Phys.org)—Atoms have been thoroughly researched, but they are still good for a surprise. Researchers of the Max Planck Advanced Study Group (ASG) at the Hamburg Center for Free-Electron Laser Science (CFEL) have now produced atoms of the noble gas xenon with an extraordinarily high charge. With only one flash of the world's most powerful X-ray laser, an international team headed by Daniel Rolles ejected 36 electrons from a xenon atom and thus stripped the atom of more than two of its highest energy shells.

New technique excites atoms and molecules using pulsed laser

The best method to obtain the most precise information on the inner structure of atoms and molecules is to excite them by means of resonant laser light. Unfortunately, just this laser light (above a certain intensity) can lead to measurable modifications within the atom's electron shell. Scientists of the Physikalisch-Technische Bundesanstalt (PTB) have now shown experimentally how to prevent such "light shifts". This confirms the advantages of "hyper" Ramsey excitation that had already been predicted theoretically.

Thanksgiving | Cosmic Variance

This year we give thanks for an idea that is central to our modern understanding of the forces of nature: gauge symmetry.

Undisturbed excitation with pulsed light

The best method to obtain the most precise information on the inner structure of atoms and molecules is to excite them by means of resonant laser light. Unfortunately, just this laser light (above a certain intensity) can lead to measurable modifications within the atom's electron shell. Scientists have now shown experimentally how to prevent such "light shifts." This confirms the advantages of "hyper" Ramsey excitation that had already been predicted theoretically.

One material, two types of magnetism

When placed next to a bar magnet, an aluminum ball draws gently towards the magnet. In contrast, a ball made of silver moves out of the magnetic field. The mechanisms underlying these different behaviors are known as paramagnetism and diamagnetism, respectively. Surprisingly, the material called BiTeI—composed of layers of bismuth, tellurium and iodine atoms—can be either diamagnetic or paramagnetic, depending on how it is prepared.

Pages

Subscribe to Mr. Loyacano RSS