Sentences with phrase «radioactive elements»

Produced by the decay of radioactive elements, these particles rarely, if ever, interact with matter, making them extremely hard to detect and study.

To detect very small quantities of mobile radioactive elements in the groundwater at former nuclear weapons production sites, researchers have developed a new type of sensor.

This is light of extremely short wavelengths typically produced either among the stars / in cosmic rays or by radioactive element decay.

This effort doubles the amount of energy recovered from the fuel and removes most of the long - lived radioactive elements from the waste that must be permanently stored.

The two teams were watching the decay of certain radioactive elements.

The tobacco industry has known how to remove this dangerous radioactive element from cigarette smoke for decades but kept the information secret.

We can measure radioactive elements so precisely that we can determine how old a particular rock sample is.

To have ALWAYS existed, without any definite time of starting in the past, this «life» period of radioactive elements long ago would have run its course.

However, he suggests listing continuing - education (CE) credits only if the courses you took were on special, advanced topics, such as quality control or preparing radioactive elements.

The team will investigate and broaden our understanding of specific groups of radioactive elements and train students to properly handle and examine radioactive samples.

Short - lived radioactive elements formed during the blast keep the shell hot as it expands.

Since these elements exist only for a definite span of years, and all the uranium, radium, thorium and other radioactive elements in the world today have not yet existed that many years, there was a time, prior to the duration of this span in the past, when these elements DID NOT EXIST!

Thanks to this sample, the research team was able to calculate the amount of curium present in the early solar system and to compare it to the amount of other heavy radioactive elements such as iodine - 129 and plutonium - 244.

These measurements may also shed light on the proportion of radioactive elements like uranium and thorium inside the Moon, since their decay produces heat and should increase the amount of heat radiated by the Moon, says Paul Spudis of the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, US, who is developing radar instruments to fly on LRO and Chandrayaan - 1.

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.

Visible from space, the Bayan — Obo iron mine in Inner Mongolia is the world's largest source of rare earths, and the Chinese companies supplying them employ acid to dissolve them out of ore rock that often also contains radioactive elements like thorium, radium or even uranium.

What's more, some large, heat - producing radioactive elements such as potassium, thorium and uranium don't fit easily into the rigid crystalline structures of minerals, so prefer melted rock when it's available.

Using radioactive elements trapped in crystallized, cream - colored «veins» in New Mexican rock, geologists have peered back in time more than 400,000 years to illuminate a record of earthquakes along the Loma Blanca fault in the Rio Grande rift.

And there are other naturally occurring radioactive elements in seawater as well, such as polonium.

For example, researchers in biogeochemistry study how microbes interact with radioactive elements in the environment — especially long - lived elements such as uranium, plutonium, and neptunium.

Some gamma rays can be produced by radioactive elements within Ceres itself, but most are byproducts of cosmic rays originating from elsewhere in space.

That plane was loaded with four hydrogen bombs when it went down on the sea ice near the Thule Air Base — 200 kilometers west of Camp Century — releasing radioactive elements including uranium and plutonium.

When cosmic rays react with the air, they form radioactive elements called isotopes.

If the original asteroids were bigger than about 20 kilometers across — and there's no reason to think they weren't — decaying radioactive elements inside them would have made the rock hotter than that.

Investigators ultimately discovered that he had ingested a lethal dose of the rare radioactive element Polonium 210.

And while the DEC's proposed rules suggest limits on radioactive elements such as radium, the EPA said it's not clear who would be «responsible for addressing the potential health and safety issues» related to radiation exposure.

Marie continued the work after her husband's tragic death in 1906; she became the first person to win a second Nobel, awarded in chemistry in 1911 for her discovery of the new radioactive elements polonium and radium.

PET employs the antiparticle of the electron, the positron, that is emitted by radioactive elements which can be attached to biologically active molecules that target specific sites of the body.

That water is saltier than seawater and may contain naturally occurring arsenic and radioactive elements trapped inside rock formations deep underground.

The plethora of unusual radioactive elements made in the rapid fusion leads to a bright light show from the freshly synthesized matter that lasts a few weeks.

Pluto's geological activity is driven both by heat leaking from radioactive elements in its interior — a remnant of its birth more than 4 billion years ago — and by the volatile compounds that flit between its surface and its atmosphere.

Elevated levels of radium have been found in groundwater samples from shallow monitoring wells on the Bethpage High School campus and the state DEC plans to take more samples and scan field and soil areas there for more radioactive elements.

Cobalt - 60 and many other radioactive elements emit highly energetic gamma rays when they decay.

Studying such compounds in the lab also helps computational researchers to improve their predictions about the more highly radioactive elements present in nuclear waste that are even more difficult to study.

«These discoveries are important in understanding that water - rich regions in the Earth's interior can play a role in the global water budget and the movement of heat - generating radioactive elements,» Tschauner said.

His chemistry lab is specifically designed to handle radioactive elements like berkelium, making it the only university lab in the country equipped to do so.

In the United States at the Nevada test site, radioactive elements moved 1.3 kilometers from their source in just 30 years: significantly more than what was predicted from theoretical calculations.

«Potential approach to how radioactive elements could be «fished out» of nuclear waste.»

DEC wastewater samples had levels of radioactive elements thousands of times higher than drinking water limits, ProPublica reported.

«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.

For 26 years forests around Chernobyl have been absorbing radioactive elements, but a fire would send them skyward again — a concern as summers grow longer, hotter and drier

Soil at the spill sites was contaminated with radium, a naturally occurring radioactive element found in brines, which chemically attached to the soil after the spill water was released.

Curium was only discovered in 1944, by Glenn Seaborg and his collaborators at the University of California, Berkeley, who, by bombarding atoms of plutonium with alpha particles (atoms of helium) synthesized a new, very radioactive element.

Even if the rifting is explained by the excess radioactive elements, there is still no definitive explanation for why only the near side of the moon ended up enriched.

«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.»

We would generally not be able to measure strontium or plutonium or other radioactive elements if we could not detect cesium because these other elements would be present in such minute amounts that our instruments are not capable of detecting them.

The slow fade of radioactive elements following a supernova allows astrophysicists to study them at length.

The most common radioactive elements that end up in the environment from a leak or explosion are iodine and caesium.