30-Jul-2006 Hypernuclei at Jefferson Lab
In 1827, Robert Brown observed that pollen grains floating in a drop of water jiggled constantly. The phenomenon became known as Brownian motion. Over 75 years later, Einstein proposed that the pollen grains were being jostled by the molecules of water. The impurity (pollen grains) Brown had added to the water allowed Einstein to deduce the presence of individual water molecules and describe at least one of their properties.
28-Jul-2006 Spin identity
Spin is an essential and fascinating phenomenon in the physics of elementary particles. Spin was first defined by Goudsmit and Uhlenbech in 1925, and has played a dramatic role in elementary particle physics, sometimes refuting theories and at other times supporting them. During Experiment E99-117 at Jefferson Lab, an international collaboration collected precision data on the spin of the neutron. Results from this experiment provide evidence that our current understanding of spin is not totally valid.
25-Jul-2006 Using instrumentation built in collaboration with JLab
College of William & Mary (CWM) scientists
have found that an equivalent
dose of potassium iodide five times
higher than the FDA-recommended
dose for humans, in the event of a
nuclear accident, is needed to protect
small animals effectively from radioactive
iodide in medical imaging procedures.
This study was performed as
part of a long-term animal nuclear
imaging project conducted by
of biology, physics and applied
science researchers from CWM and
The Department of Energy's Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time.