neutrons

Story tips from the DOE's Oak Ridge National Laboratory, Dec. 2008

...ion and irradiation tests for materials research. Beyond these contributions, HFIR, supported by the Office of Science, is a world leader in producing neutrons for materials studies. SENSORS -- On the prowl . . . Mathematics and sensors come together in some new ways to form a powerful tool for comba...

Delft University of Technology patent for manufacturing radio isotopes

...um, a material which mining companies already extract from the ground. Wolterbeek has patented a technique in which he bombards this raw material with neutrons in order to make molybdenum-99. The molybdenum atoms are not just 'activated' by the neutron bombardment, but are also separated from the surrounding ...

The eyes have it

...act that researchers can now put to good use. A minute quantity of Carbon (C-12) in the carbon-dioxide content of the atmosphere contains two extra neutrons and is therefore called Carbon-14 (C-14). This isotope is radioactive, but decays so slowly and harmlessly into nitrogen, that this small carbon eleme...

Argonne's Blue Gene/P to host large cadre of INCITE researchers

...iple-alpha burning the process by which a mature star creates carbon-12 nuclei from helium-4 nuclei and the structure of exotic nuclei with many more neutrons than protons. Robert Sugar of the University of California-Santa Barbara was awarded 19.6 million hours at Argonne and 7.1 million hours at ORNL...

Scientists Predict Bleak Future For Life

... radiation-including heat, light and all other forms-will vanish faster than it can be replenished through the decay of matter into component protons, neutrons and electrons. At the crux of the issue is dark energy, a hypothetical field or anti-gravity energy, which permeates space and tends to accelerate ...

Abnormal Abeta - Protein Level in Human Brain Trigger Alzheimer's Risk

...y slightly altered to label it. Inside the leucine are carbon atoms with 13 neutrons and protons in their nucleus instead of the more common 12 neutrons and protons--in scientific parlance, carbon 13 instead of carbon 12. 'N...

New Multi-Modal Contrast Agents, A Boon For Medical Imaging

... ‘What it means,’ Watkin said, ‘is that these little particles capture the neutrons and emit alpha and gamma rays, and that energy -- sent out from an accelera...this, we both said, 'Holy … cow!' These little gadolinium particles capture neutrons at four times a greater rate than boron, and yet boron is what is (currentl...

neutrons in Medical Dictionary

Radioisotope

... (Redirected from Radioisotope ) Jump to: navigation, search ... Radioisotopes produced with nuclear reactors exploit the high flux of neutrons present. ... Radio- isotope . Max fuel. used (kg) Mass (kg) Electrical (W) Heat (W) SRG ... Stirling Radioisotope Generator. DOE contributio...

neutrons in Biological News

Meat and two neutrons -- the key to a longer life

Indulging in an isotope-enhanced steak or chicken fillet every now and again could add as much as 10 years to your life. Scientists have shown for the first time that food enriched with natural isotopes builds bodily components that are more resistant to the processes of ageing. The concept has bee...

Spallation Neutron Source sees first target replacement

... by the SNS's linear accelerator strikes the target 60 times per second with a force comparable to bursts from a large-caliber machine gun, "spalling" neutrons from the circulating mercury inside. Eventually, the wear and tear of those forces were expected over time to damage the stainless steel of the tar...

Breaking the ties that bind: New hope for biomass fuels

...s from the U.S. Department of Agriculture and the Centre de Recherches sur les Macromolcules Vgtales in France, Los Alamos researcher Paul Langan used neutrons to probe the crystalline structure of highly crystalline cellulose, much like an X-ray is used to probe the hidden structures of the body. Langan and ...

Two-day symposium in Baltimore to tackle the promises and perils of proton radiotherapy

...tion of clinical trials, and biological questions such as RBE and secondary neutrons will also be presented. HIGHLIGHTS OF THE SYMPOSIUM Dr. Eric Klei.... The process of creating proton beams also generates a large number of neutrons -- which may cause secondary cancers. Studies of survivors of the Hiroshima...

Structure of enzyme against chemical warfare agents determined

...s, so heavier elements are more easily seen, while neutrons interact with the atomic nuclei, and atoms in pro... oxygen, nitrogen, carbon, and sulfur, all scatter neutrons in a similar manner. Yet despite being so widespr...are normally invisible in structures. In contrast, neutrons interact with the atomic nuclei, such that atoms ...

How mirror neurons allow us to learn and socialize by going through the motions in the head

...ror neuron as a neuron capable of being triggered by imitation, as a mechanism both for learning and empathising in social situations. While mirror neutrons cannot be observed directly in humans because electrodes cannot be inserted into their brains, the action has been inferred by imaging of the whole br...

European researchers harness unique properties of boron to develop new drugs and diagnostics

...eyond the current application in cancer radiotherapy via boron neutron capture therapy (BNCT), in which the element is used to help translate beams of neutrons into radiation that targets tumour cells with less "collateral damage" of surrounding healthy tissue. "Yes, it became obvious during the workshop ...

Candy-coating keeps proteins sweet

...have shown that the lifetimes of these bond networks can be measured directly with a fluorescent probe. This method is much more convenient than using neutrons and could be used for routine formulation evaluation. Hydrogen bonds are responsible for many of waters properties; they make water a liquid at ro...

Drinking water in Gaza Strip contaminated with high levels of nitrate

...ratios of nitrogen (15N/14N) and oxygen (18O/16O) in the nitrate. Isotopes are variations of the same chemical element that have a different number of neutrons in their nuclei. 18O and 15N are stable, i.e. non-radioactive, isotopes that are heavier than "normal" oxygen (16O) or nitrogen (14N) and can therefor...

UC San Diego researchers could help US military thwart explosive threats

... olfacation (gas chromatography and differential mobility spectrometry); neutron activation, in which the machines bombard the suspect explosives with neutrons and read the gamma radiation decay signatures to determine the chemical compositions of the sample; and specially trained dogs. "The U.S. government...

neutrons in Biological Technology

Spallation Neutron Source sends first neutrons to 'Big Bang' beam line

OAK RIDGE, Oct. 9, 2008 -- New analytical tools coming on line at the Spallation Neutron Source, the Department of Energy's state-of-the-art neutron science facility at Oak Ridge National Laboratory, include a beam line dedicated to nuclear physics studies. The Fundamental Neutron Physics Beam ...

Material world: Graphene's versatility promises new applications

... This quantum capacitance is the result of the Pauli exclusion principle, which states that two fermionsa class of common particles including protons, neutrons and electronscannot occupy the same location at the same time. Once a quantum state is filled, subsequent fermions are forced to occupy successively h...

Stanford researchers find a quicker, cheaper way to sort isotopes

...all have the same number of protons in their core, but may have differing numbers of neutrons. Carbon, for example, has six protons, but the number of neutrons in carbon atoms can vary from six to seven or eight. Each variation is an isotope of carbon. Zare had the idea that it could be possible to disting...

Structure of enzyme against chemical warfare agents determined

...s, so heavier elements are more easily seen, while neutrons interact with the atomic nuclei, and atoms in pro... oxygen, nitrogen, carbon, and sulfur, all scatter neutrons in a similar manner. Yet despite being so widespr...are normally invisible in structures. In contrast, neutrons interact with the atomic nuclei, such that atoms ...

Structure of enzyme against chemical warfare agents determined

...s, so heavier elements are more easily seen, while neutrons interact with the atomic nuclei, and atoms in pro... oxygen, nitrogen, carbon, and sulfur, all scatter neutrons in a similar manner. Yet despite being so widespr...are normally invisible in structures. In contrast, neutrons interact with the atomic nuclei, such that atoms ...

Structure of enzyme against chemical warfare agents determined

...s, so heavier elements are more easily seen, while neutrons interact with the atomic nuclei, and atoms in pro... oxygen, nitrogen, carbon, and sulfur, all scatter neutrons in a similar manner. Yet despite being so widespr...are normally invisible in structures. In contrast, neutrons interact with the atomic nuclei, such that atoms ...

Nanotechnologists gain powerful new materials probe

...samples constituent atoms in specific directions and with specific velocities that reflect the arrangement of atoms within the material. Analyzing how neutrons scatter from a sample can tell scientists a great deal about the materials physical properties, but older spectrometers are limited to relatively larg...

Story tips from the Department of Energy's Oak Ridge National Laboratory, March 2008

...tly ramped up beam power to more than 300 kilowatts, producing 4.8 x 10e 16 neutrons per second. The SNS is currently sending neutrons to five instruments of an eventual 24, and its first article has been accep...

Copolymers block out new approaches to microelectronics at NIST

... Jones, together with colleagues from NIST, the University of Maryland and IBM, has used NISTs neutron scattering and reflectivity facility to deflect neutrons off block copolymer films from many different angles. By combining the many 2-D neutron scattering pictures into a single composite scattering pattern...

New paper reveals nanoscale details of photolithography process

... NIST measurements reveal a much more complicated process. By substituting deuterium-based heavy water in the chemistry, the NIST team was able to use neutrons to observe the entire process at a nanometer scale. They found that at the edges of exposed areas the photoresist components interact to allow the dev...

neutrons in Biological Dictionary

Protons

... Protons and neutrons are both nucleons, which may be bound by the nucle...eep inelastic scattering ... Along with protons , neutrons make up the nucleus, held together by the strong f...o calculate the number of protons , electrons and neutrons in an atom of any element. ... Adding or removin...