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Neutron scattering studies of lattice excitations in a fresnoite crystal revealed a way to speed thermal conduction. Image credit: Oak Ridge National Laboratory, U.S. Dept. of Energy; graphic artist Jill Hemman
Researchers at the Department of Energy’s Oak Ridge National Laboratory made the first observations of waves of atomic rearrangements, known as phasons, propagating supersonically through a vibrating crystal lattice—a discovery that may dramatically improve heat transp...
From left, ORNL’s Rick Lowden, Chris Bryan and Jim Kiggans were troubled that target discs of a material needed to produce Mo-99 using an accelerator could deform after irradiation and get stuck in their holder.

“Made in the USA.” That can now be said of the radioactive isotope molybdenum-99 (Mo-99), last made in the United States in the late 1980s. Its short-lived decay product, technetium-99m (Tc-99m), is the most widely used radioisotope in medical diagnostic imaging. Tc-99m is best known ...

ORNL Image

For the past six years, some 140 scientists from five institutions have traveled to the Arctic Circle and beyond to gather field data as part of the Department of Energy-sponsored NGEE Arctic project. This article gives insight into how scientists gather the measurements that inform t...

Nanoscale spikes of carbon help catalyze a reaction that generates ammonia from nitrogen and water.
The search for a more energy efficient and environmentally friendly method of ammonia production for fertilizer has led to the discovery of a new type of catalytic reaction. Researchers at the Department of Energy’s Oak Ridge National Laboratory used nanoscale spike...
Illustration of satellite in front of glowing orange celestial body

A shield assembly that protects an instrument measuring ion and electron fluxes for a NASA mission to touch the Sun was tested in extreme experimental environments at Oak Ridge National Laboratory—and passed with flying colors. Components aboard Parker Solar Probe, which will endure th...

Christina Forrester

Christina Forrester’s meticulous nature is a plus for her work leading technical testing and analysis of radiological and nuclear detection devices, whether that work takes her to the Desert Southwest or to her own lab outfitted with specialized 

New exascale earth modeling system for energy
A new earth modeling system will use advanced computers and have weather scale resolution to simulate aspects of Earth’s variability and anticipate decadal changes that will critically impact the United States’ energy sector. The Energy Exascale Earth System Model, or E3SM, relea...
Neutron interactions revealed the orthorhombic structure of the hybrid perovskite stabilized by the strong hydrogen bonds between the nitrogen substituent of the methylammonium cations and the bromides on the corner-linked PbBr6 octahedra.
Neutron scattering has revealed, in real time, the fundamental mechanisms behind the conversion of sunlight into energy in hybrid perovskite materials. A better understanding of this behavior will enable manufacturers to design solar cells with increased efficiency...
Innovation Crossroads

Oak Ridge National Laboratory today welcomed a second group of technology innovators to join Innovation Crossroads, the Southeast’s only entrepreneurial research and development program based at a U.S. Department of Energy national laboratory. Selected through a me...

A tetradentate ligand selects americium (Am, depicted by green spheres) over europium (Eu, blue spheres). Red indicates oxygen atoms and purple, nitrogen atoms that are the key to the ligand’s selectivity. Image credit: Oak Ridge National Laboratory, U.S.
After used nuclear fuel is removed from a reactor, it emits heat for decades and remains radioactive for thousands of years. The used fuel is a mixture of major actinides (uranium, plutonium), fission products (mainly assorted metals, including lanthanides) and minor actinides (i.e....