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The Ames Laboratory Radioactive Waste Management Basis is documented in accordance with DOE Order 435.1 Radioactive Waste Management and DOE Manual 435.1-1 Radioactive Waste Management Manual, which establish requirements for the management of radioactive waste at facilities operated by the Department of Energy (DOE) and its contractors. The Environment, Safety, Health and Assurance (ESH&A) Office is responsible for all radioactive waste operations at the Ames Laboratory.
Join forces Thursday, October 22, for a lab-wide safety day. The event kicks off with breakfast at 8:30 and speaker Jim Withers bringing us “Human Safety Performance: Why Does This Sound Familiar?!.” Choose your mid-morning safety seminar schedule from a number of sessions. Lunch at noon will be followed by a safety improvement activity and cake at 3:30!
For more information see The Day's Mission!
Oxygen is one of the most ubiquitous elements in chemistry and materials science, yet one of the most elusive elements for spectroscopic investigation by solid-state Nuclear Magnetic Resonance (SSNMR). Used to determine the structure of materials and chemicals on the atomic scale, SSNMR requires nuclei that have magnetic moments. Yet, less than four of every 10,000 oxygen nuclei are 17O, the only NMR-active isotope of oxygen.
Much like a flock of birds in motion need to know what their neighbors are doing, electrons and magnetic moments in a solid need to interact if they are to successfully order or arrange themselves into a new state. If one or two birds are missing, the unit can still function, but if too many are removed, it becomes hard to coordinate the flock. Studying a magnetic compound containing cerium, scientists found that the magnetism on cerium is like rare birds that can fly as part of a flock even when most of the group is gone. Researchers found that they could remove between 80 and 95% of t
By simply changing the solvent, organic reactions vital for producing the starting materials for many major industrial processes have been found to be faster and able to yield the desired product with close to 100% selectivity.
A team of researchers has developed a model that calculates how to create light rulers—known in science speak as frequency combs—from a nearly single frequency of light using graphene. Graphene’s conductivity varies with time when responding to electromagnetic pulses, opening up the possibility to manipulate the pulses and create highly tunable light rulers. The team showed if a beam of light is transmitted through graphene while tweaking the material’s conductivity (how much electricity the material can transmit) it creates a spectrum of light with evenly distributed peaks that function
Researchers have studied the effect of concentration on the activity and selectivity in a zirconium-catalyzed hydroamination reaction. In this important reaction for the efficient and atom economical synthesis of valuable amine compounds, the nitrogen-hydrogen bond adds across a carbon double bond to give a new nitrogen-carbon bond. Varying concentrations allows for the systematic tuning of a homogeneous 3D environment, impacting the selectivity.
A unique combination of state-of-the-art experimental techniques—electrostatic levitation and high-energy X-ray diffraction—has led to the discovery of a short-lived intermediate step that facilitates the liquid to solid transition in a nickel-zirconium (Ni-Zr) alloy. A small charged bead of Ni-Zr was levitated using a controlled electric field.