Latest Atomic physics Stories

2008-04-02 15:52:22

A research team from the National Institute of Standards and Technology (NIST) and the University of Maryland has succeeded in cooling atoms of a rare-earth element, erbium, to within two millionths of a degree of absolute zero using a novel trapping and laser cooling technique. Their recent report* is a major step towards a capability to capture, cool and manipulate individual atoms of erbium, an element with unique optical properties that promises highly sensitive nanoscale force or...

2008-03-10 16:04:13

Ultracold atoms moving through a carefully designed arrangement of laser beams will jiggle slightly as they go, two NIST scientists have predicted.* If observed, this never-before-seen "jitterbug" motion would shed light on a little-known oddity of quantum mechanics arising from Paul Dirac's 80-year-old theory of the electron. Dirac's theory, which successfully married the principles of Einstein's relativity to the quantum property of electrons known as spin, famously predicted that the...

2008-03-06 11:50:00

Scientists from the University of Texas at Austin open up new avenues of research using atomic coilguns and lasersStopping and cooling most of the atoms of the periodic table is now possible using a pair of techniques developed by physicist Mark Raizen at The University of Texas at Austin. Raizen stopped atoms by passing a supersonic beam through an "atomic coilgun" and cooled them using "single-photon cooling." The techniques are a major step forward in atomic physics and have a variety of...

2005-10-11 14:12:27

Trapping, cooling, and storing neutral atoms requires an elaborate process. As a first method we have, now almost classic, laser cooling in a "magneto-optical trap". Atoms are shot from six directions with laser beams whose frequency lies somewhat below the excitation energy. In this way, the particles always absorb light when they move themselves on the beam - because of the Doppler effect, they are in resonance - and then are slowed down in this direction. We call it cooling, when an...

2005-09-07 19:10:06

BERKELEY "“ Physicists at the University of California, Berkeley, have the universe's coldest substance running in circles. The UC Berkeley team has created a Bose-Einstein condensate of rubidium atoms and nudged it into a circular racetrack 2 millimeters across, creating a particle storage ring analogous to the accelerator storage rings of high energy physics. This ring, the first to contain a Bose-Einstein gas, is full of cold particles at a temperature of only one-millionth of a...

2005-07-24 02:52:57

The journal Nature publishes this week a study of electronic dynamics ("Direct observation of electron dynamics in the attosecond domain"). The participants of this study, together with other researchers, have been professors Daniel Sánchez-Portal and Pedro Miguel Etxenike from the Donostia International Physics Center (DIPC). A researcher group of various German laboratories has done the experimental part of the study, and the theoretical explanation based on quantum physics of what has...

Latest Atomic physics Reference Libraries

2013-03-16 00:00:00

Niels Henrik David Bohr (October 7, 1885 - November 18, 1962) was a Danish physicist. He made essential contributions to understanding atom structure and quantum mechanics. Born in Copenhagen, Denmark to Christian Bohr and Ellen Adler, Bohr got his doctorate at Copenhagen University in 1911. He then studied under Ernest Rutherford in Manchester, England. Based on Rutherford's theories, Bohr published his Bohr model about atom structure in 1913, introducing the theory of electrons...

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