Sudden bursts of heat that can damage the inner walls of tokamak fusion experiments are a hurdle that operators of the facilities must overcome. Such bursts, called 'edge localized modes (ELMs),' occur in doughnut-shaped tokamak devices that house the hot, charged plasma that is used to replicate on Earth the power that drives the sun and other stars. Now researchers at the US Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) have directly observed a possible and previously unknown process that can trigger damaging ELMs.
Researchers have developed a new technique that allows them to assess radiation exposure in about an hour using an insulator material found in most modern electronics. The technique can be used to triage medical cases in the event of a radiological disaster.
Performing studies on a doubly magic isotope of tin, researchers have shown that the pion condensation should occur at around two times normal nuclear density, which can be realized in a neutron star with a mass of 1.4 times that of the Sun.
This manuscript attempts to present an overview of availability sources of 225Ac and production methods by which additional supplies might be made available to the community of clinical researchers seeking their application in the treatment of human disease.
Researchers at University of Tsukuba and Australian National University resolved a longstanding puzzle of nuclear fission why nuclear fission of heavy (actinide) nuclei results predominantly in asymmetric mass-splits. These findings may explain surprising bservations of asymmetric fission of lighter than lead nuclei.
A team of scientists has for the first time measured the elusive weak interaction between protons and neutrons in the nucleus of an atom. They had chosen the simplest nucleus consisting of one neutron and one proton for the study. Through a unique neutron experiment at Oak Ridge National Laboratory, experimental physicists resolved the weak force between the particles at the atom's core, predicted in the Standard Model that describes the elementary particles and their interactions.
An international research collaboration including Osaka University has reported the first experimental evidence that the strongly correlated proton-neutron pairs found in an atomic depend on nuclear structure. The experiment, conducted on a new beam line at the Osaka cyclotron facility, demonstrated the dominance of tensor interactions in the neutron pickup reaction. It is hoped that the findings will improve our understanding of neutron stars and other celestial bodies.
A new system allows detailed real-time observations of how materials are affected by a high-radiation environment. The system, developed at MIT and Sandia National Laboratories, could accelerate the development of better materials for nuclear plants.
The properties of the matter, which surrounds us in our everyday life, are typically the result of complex interactions between electrons. However, how matter behaves under extreme conditions is still largely unexplained. A research group at Kiel University and the Helmholtz-Zentrum Dresden-Rossendorf has developed a method to accurately describe the dynamic properties of this warm dense matter for the first time. They published their computer simulations in the current issue of the Physical Review Letters.
Nuclear physicists analyzing data from the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC) have published additional evidence that collisions of miniscule projectiles with gold nuclei create tiny specks of the perfect fluid that filled the early universe.