Tag: "neutrons" at biology news

Story tips from the Department of Energy's Oak Ridge National Laboratory, September 2004

.... The researchers used intense beams of X-rays and neutrons for diffraction, along with computer simulation of molecular motions, to study the structural changes in more detail than ever before. This class of glass includes silica (SiO2), an abundant component in the deep Earth, and was thought to undergo an ...

NIST's new way of 'seeing': A neutron microscope

A prototype microscope that uses neutrons instead of light to "see" magnified images has bee...hitting a sample with an intense neutron beam. The neutrons that pass through--whose pattern reflects the sample's internal structure--are directed into a row o...

Measuring artificial viruses to improve disease detection

... of artificial RNA virus solutions using a beam of neutrons as probes. As neutrons pass through the test solution, they interact in very specific ways with particular atoms, providing...

Strengthening independent junior research groups in collaborative research centres

...ing to study the internal structure of protons and neutrons with a series of detectors, such as the unique "crystal barrel". New particles are discovered time and time again, as frequently predicted by theoreticians. For instance, so-called pentaquarks, previously unknown exotic particles consisting of five q...

High Flux Isotope Reactor marks 400th cycle

...on materials, and to industry, which relies on the neutrons for isotope production and advanced materials anal...s Office of Science. New beam lines, which channel neutrons to experimental instruments, have been installed. A new experiment hall has been constructed, and a ...

The Geiger counter within us

...oving, heavy particles such as alpha particles and neutrons should leave a characteristic pattern of damage. These kinds of radiation are known as "densely ionising" because they wreak havoc within a short tunnel; "sparsely ionising" X-rays or gamma rays spread their damage along a much longer path. Because t...

DFG to establish nine new collaborative research centres

...mic nuclei and their building blocks, the protons, neutrons and mesons, can be researched on so-called electron accelerators using the help of electromagnetic probes, that is beams of electrons and photons. With this in mind, the Collaborative Research Centre on "Nuclear Structure, Nuclear Astrophysics and Fu...

ORNL, Georgia's Isotron develop promising new cancer treatment

...iver a highly concentrated dose of californium-252 neutrons to the site of a tumor instead of having to treat the tumor with conventional gamma rays, which often are not as effective. This therapy has proved particularly useful against cancers that are resistant to photon and gamma treatments, which do not ki...

Hiroshima porcelain pieces provide insight into exposure levels

...sure for humans. (Neutron fluence is the number of neutrons from the blast found per square centimeter.) The a... again. These fission events occurred when thermal neutrons from the bomb caused fission in the normal trace amounts of uranium in the material, MacDonald expla...

Fusion in a flash?

...p of the other, says Taleyarkhan. Using a pulse of neutrons to first seed the tiny bubbles, each no bigger tha...ium fusion reactions create two telltale products: neutrons of a characteristic energy and tritium, another hydrogen isotope. Using very sensitive detectors, Ta...

How cold! New partnership to use chilled neutrons

...ther organizations will use beams of super-chilled neutrons to probe the elusive structure and interactions of...inuallychanging landscape of cell membranes. "Cold neutrons provide a powerful toolfor studying cell membrane systems,"says White, "but the demand for beam time...

PNNL science, technology help keep America safe

...ns that detect the presence of radionuclides. The neutrons react with the lithium isotope to leave an ionization trail through the glass matrix, which results in light emission from the cerium. PUMA is being commercialized by Nucsafe of Knoxville, Tenn. PNNL researchers who developed PUMA received a R&D 10...

Krauss book explores universe from oxygen atom's perspective

...f the Big Bang, where quarks form into protons and neutrons that within minutes become the building blocks for helium and hydrogen -- the first elements. It takes several billion years before the oxygen atom ultimately forms, and during this time its ingredients experience cosmic odysseys as they travel thro...

The ultimate pocket protector--radiation detection made easy

...ther atoms like a cue ball in a game of pool. The neutrons are then bounced away in other directions. "It's...the number of neutrons. Subtracting the number of neutrons from the total number of counts from both sensors calculates the gamma rays. The sandwich-sized s...

Radiating relief: Researcher combats stubborn arthritis with neutrons

...An injection and a few minutes in a gentle beam of neutrons may someday ease the pain of severe rheumatoid art...les called neutrons. The boron absorbs some of the neutrons and forms a radioactive substance that quickly decays. Radiation from the decay kills the synovium a...

New UNC-CH study explains variations in onset of ice ages

...ore heavy oxygen - oxygencontaining two additional neutrons in its nucleus compared with standard oxygen- corresponds to colder temperatures. That the geologic record shows ice ages occur every 80,000 to 120,000years has confounded researchers who felt such astronomically controlled eventsshould occur...

Pacific Northwest developments earn spots in top 100 list

...s thatprovides portable, real-time measurements of neutrons and gamma rays. CalledPUMA for plutonium measurement and analysis, the sensor is both more flexibleand rugged than rigid gas tube sensor technology. The fibers emit light toindicate various levels of radiation and can be embedded in a variety ofmat...

Technotes -- Pacific Northwest National Laboratory's summer news tipsheet

...s that provides portable,real-time measurements of neutrons and gamma rays. Called PUMA for plutoniummeasurement and analysis, the sensor can be embedded in a variety of materialsor literally wrapped, like fingers, around objects of various shapes to analyzecontents. The technology is adaptable to a wide ran...

From Corn Rootworms To Art, Cornell's Reactor Is At The Core

...lear reactor at Ward Laboratory produces a beam of neutrons that is focused to a plate holding a sample. Behind the sample is film. The neutrons pass through the film (unlike X-rays, without activating the emulsion) and land on a conversion scre...

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