Sentences with phrase «radioactive forms of»

Large and small animal nuclear medicine is available and is a subspecialty of radiology in which radioisotopes (compounds containing radioactive forms of atoms) are put into the body to evaluate organ function or localize bone disease such as stress fractures or tumor metastasis.

To probe «closed shell» effects surrounding elements with 32 neutrons, a team at TRIUMF produced exotic, radioactive forms of titanium and weighed them with the ultra-precise mass spectrometers at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) facility.

Members of a team led by paleoanthropologist Isaiah Nengo estimated the fossil's age by assessing radioactive forms of the element argon in surrounding rock, which decay at a known rate.

Age estimates relied on measures of the decay of radioactive forms of argon and uranium in volcanic ash layers framing tool - bearing sediment.

Nuclear explosions produce radioactive substances that are rare in nature — like carbon - 14, a radioactive form of the carbon atom that forms the chemical basis of all life on earth.

Researchers examined the covers with carbon dating — which looks at a radioactive form of carbon in a sample to determine its age — and other tools, finding the artifacts are authentic.

Dating relied on measures of the decay of a radioactive form of uranium in the human fossil and a nearby hippo tooth.

Tritium is a radioactive form of hydrogen which increases the destructive power of nuclear weapons.

The human body takes up strontium, for example, as if it were calcium, which is why the radioactive form of the element can collect in teeth, nails and bones, causing serious health problems such as bone cancer.

In their analyses of the beaches, the scientists detected not only cesium - 137, which may have come from the Dai - ichi plant or from nuclear weapons tested in the 1950s and1960s, but also cesium - 134, a radioactive form of cesium that can only come only from the 2011 Fukushima accident.

Millions of patients depend on a rare radioactive form of one element to scan them for disease.

Miller and colleagues came to these conclusions by looking at radiocarbon dates — based on how much of the radioactive form of carbon they contain — from dead plants revealed by melting ice on Baffin Island, in the Canadian Arctic.

Radiocarbon is a radioactive form of carbon that's created when nitrogen reacts with cosmic rays in the upper atmosphere.

Radioactive iodine is a radioactive form of the mineral iodine.

Not exact matches

These include the products of radioactive decay, cosmic rays (the highest - energy form of electromagnetic radiation known to man), and the stellar wind, a stream of particles that fly out from any star as it continuously burns.

At present 5,900 tons of high - level waste (HLW) in the form of spent fuel assemblies are sitting in pools next to operating reactors, together with 75 million gallons of radioactive liquid waste, plus 27 million cubic feet of trans - uranic waste (TRU).

And yet, exposure occurs constantly, since radiation is released regularly from Indian Point in the form of liquid, gaseous, and solid radioactive wastes.

As a matter of regular operation, radiation is released from Indian Point in the form of liquid, gaseous, and solid radioactive wastes.

The colors represent the relative amounts of short - lived radioactive isotopes, such as iron - 60, injected into a newly formed protoplanetary disk (seen face on with the protostar being the light purple blob in the middle) by a supernova shock wave.

Some isotopes that existed when the Solar System formed are radioactive and have decay rates that caused them to become extinct within tens to hundreds of million years.

In a new study, Scripps Institution of Oceanography at the University of California San Diego Professor James Day and colleagues examined the chemical composition of zinc and other volatile elements contained in the green - colored glass, called trinitite, which were radioactive materials formed under the extreme temperatures that resulted from the 1945 plutonium bomb explosion.

These particles are one of the most pervasive forms of matter in the Universe: they are created in the Sun and in supernovas, by cosmic rays crashing into the upper atmosphere, and they are even made on Earth, streaming out from nuclear reactors and radioactive rocks.

What's more, fewer neutrons would be produced, reducing the number of radioactive isotopes formed.

The government has cleaned up most of the «trinitite», the glassy green radioactive mineral formed by the blast.

She reckoned that a rare form of old «metal poor» star, one with one - thousandth the iron content of our own young sun, carries an internal clock, one composed of the radioactive elements uranium and thorium.

Tellingly, there was no sign of iron, an element that forms by radioactive decay only many days after a supernova.

The committee pointed out that there is already a huge quantity of radioactive waste which is not in a form suitable for separation.

In 1980, Congress passed a law that made states responsible for disposal of their own wastes, but states were encouraged to form compacts to locate one low - level radioactive waste site for several states.

Many researchers had gauged how long Mars took to form using the steady decay of radioactive hafnium - 182 to tungsten - 182, but the answers were all over the place.

The key to these measurements is carbon - 14, a radioactive (yet harmless) isotope of carbon that is formed in the upper atmosphere.

«The moon has a single region of the crust, a large basaltic plain called Procellarum, where radioactive elements ended up as the moon was forming,» Siegler said.

By measuring the amount of radioactive elements inside Earth, the detector can study how the planet formed.

In particular, a relatively new form of nuclear technology could overcome the principal drawbacks of current methods — namely, worries about reactor accidents, the potential for diversion of nuclear fuel into highly destructive weapons, the management of dangerous, long - lived radioactive waste, and the depletion of global reserves of economically available uranium.

It has no form of containment, so even a minor radioactive leak can escape into the environment.

But the crescent - shaped C. moniliferum caught Krejci's eye because of its unusual ability to remove strontium from water, depositing it in crystals that form in subcellular structures known as vacuoles — an knack that could include the radioactive isotope strontium 90.

In June archaeologist Alistair Pike, now at the University of Southampton, described a clever way to get answers: Analyze the breakdown of radioactive uranium - 234 embedded in the natural mineral crust that forms on top of the artworks.

2 Fusion On Tap Plasma physicist Eric Lerner has a dream: a form of nuclear energy so clean it generates no radioactive waste, so safe it can be located in the heart of a city, and so inexpensive it provides virtually unlimited power for the dirt - cheap price of $ 60 per kilowatt — far below the $ 1,000 - per - kilowatt cost of electricity from natural gas.

«Even if our formation wasn't triggered by a supernova, the presence of decay products of certain radioactive elements points to a supernova perhaps seeding the already formed young solar system with enriched elements.»

One such product linked to these activities, isosaccharinic acid (ISA), causes much concern as it can react with a wide range of radionuclides — unstable and toxic elements that are formed during the production of nuclear power and make up the radioactive component of nuclear waste.

When the core ignites, carbon and oxygen fuse to form lots of radioactive cobalt - 56, whose radioactive decay into iron - 56 with a half - life of 77 days powers the peak brightness of a supernova.

The tablets swamp the thyroid with non-radioactive iodine, preventing uptake of the radioactive form.

The clusters of lead atoms formed 1 billion years after crystallization of the zircon, by which time the radioactive decay of uranium had formed the lead atoms that then diffused into clusters during reheating.

Their discovery could aid in the synthesis of new «radiotracers» — chemical compounds that contain a radioactive form, or isotope, of an element — for use with a noninvasive, high - resolution 3 - D medical imaging technology known as PET (positron emission tomography) scanning.

The afterglow shows that the merger spewed between 0.1 and 0.2 solar masses of newly formed radioactive elements into space, more than could have escaped from a black hole.

But the buildup of heat from the decay of radioactive elements in the interior then remelted parts of the mantle, which began to erupt onto the surface some 500 million years after the Moon's formation, pooling in impact craters and basins to form the maria, most of which are on the side of the Moon facing the Earth.

Caption: The colors represent the relative amounts of short - lived radioactive isotopes, such as iron - 60, injected into a newly formed protoplanetary disk (seen face on with the protostar being the light purple blob in the middle) by a supernova shock wave.

This isotope forms by the radioactive decay of potassium 40, which is sequestered in the rocks deep in Titan's core.

These contain traces of the radioactive elements uranium and thorium, which indicate when the deposits formed — and therefore give a minimum age for whatever lies beneath.

Carbon has three isotopes — forms of the element with the same number of protons but different masses — but only carbon - 14 is radioactive.

These contain traces of the radioactive elements uranium and thorium, which indicate when the deposits formed - and therefore give a minimum age for whatever lies beneath.