Radioactivity refers to the process in which certain elements or substances release energy in the form of tiny particles or waves. These particles or waves can be harmful to living things because they can damage cells or cause illnesses.
Full definition
For the purpose of this Exclusion; i) Utilization of Nuclear weapons of mass destruction means the use of any explosive nuclear weapon or device or the emission, discharge, dispersal, release or escape of fissile material emitting a level
of radioactivity capable of causing incapacitating disablement or death amongst people or animals (including in connection with Terrorist Activity).
On 1 April, TEPCO admitted that levels of
radioactivity in groundwater underneath the facility were 10,000 times the legal limit, mainly as a result of contamination with iodine - 131.
Very high levels of
radioactivity from radon gas have been found in abandoned mines used by prospectors in Southwest England.
Damage, deconstruction or loss to property is insured by — i) ionising radiation, or contamination
by radioactivity from nuclear fuel or wastage from the combustion of nuclear fuel.
Scientists tested
for radioactivity at eight different beaches within 100 kilometers of the plant, which experienced three reactor meltdowns when an earthquake and tsunami on March 11, 2011, knocked out its power.
'' «We Were Not Afraid of the Water Then» - Focus
on Radioactivity in the Puerco River,» People's Daily World, August 1, 1989.
To shield the detector as much as possible from
natural radioactivity in the cavern, the detector (a so - called Liquid Xenon Time Projection Chamber) sits within a cryostat submersed in a tank of water.
Co-author Tom Hinton, from the Institute of Environmental
Radioactivity at Fukushima University in Japan, acknowledges that the study did not probe how the radioactive contamination has affected individuals.
The EPA is also aggressively prodding state regulators and others involved in natural gas extraction in the Marcellus Shale to release what they know
about radioactivity in the wastewater.
«Depending on the equipment used, this method could scale to
detect radioactivity at distances of at least tens of kilometers and possibly as far as 100 km,» says Professor Choi.
The first acid test of the new method was based upon radiocarbon dating of known age samples Willard Libby developed radiocarbon dating as a method to
measure radioactivity.
Fanned by winds that shifted suddenly to the east, the fallout plume spread high levels of
radioactivity over an area that stretched for hundreds of kilometers and included several inhabited islands.
Meanwhile, the water that has been pumped into the reactors to cool them is threatening to overflow its tanks in the next few days and carry
radioactivity into the sea.
The human assault on the planet usually does not make headlines unless there is a sudden calamity — giant fires in Indonesia or
radioactivity escaping from a nuclear plant in Chernobyl.
Ewing's Russian colleagues, led by Alexander Novikov of the Russian Academy of Sciences, sampled the groundwater taken from wells up to four kilometers from the scene of original contamination,
where radioactivity levels reach roughly 1,000 becquerels (nuclei decaying per second) per liter.
The nickel decays first into cobalt and then iron, driving the supernova's light display as intense
radioactivity makes the explosion glow white - hot.
Unfortunately, there was also about a 25 percent chance that the events were instead caused by
background radioactivity.
He won the Nobel Prize for Physics in 1938 for
inducing radioactivity in matter by slamming neutrons into atoms.
While the results did not detect dark matter particles — known as «weakly interacting massive particles» or «WIMPs» — the combination of record
low radioactivity levels with the size of the detector implies an excellent discovery potential in the years to come.
In fact, as I previously wrote in an article for Symmetry magazine, even your own body
produces radioactivity.
The move marks the first time an Indian university has been completely barred from
using radioactivity, and research and teaching there are likely to suffer.
You can view videos of some past Perimeter physics lectures below: Strange, Dense Matter: The Power of Neutron Stars [Video]
How Radioactivity Can Benefit Your Health [Video] The Promise of Optical Atomic Clocks: Watch Live Wednesday [Video] The Astonishing Simplicity of Everything [Video] The Man Who Explained the Atom [Video] The Future of Cosmology [Video] The Upgraded LHC and the Search for the Higgs Boson [Video] String Theory LEGOs for Black Holes [Video]
It says that the
total radioactivity produced by underground testing at the two atolls is only about 1 per cent of that produced by all atmospheric tests carried out around the world since 1945.
Emerging evidence also suggests that it binds with radioactive isotopes and may be useful for
radioactivity exposure or radiation therapy.
A 2011 investigation by the New York Times, based on thousands of internal EPA documents, «reveal that the wastewater, which is sometimes hauled to sewage plants not designed to treat it and then discharged into rivers that supply drinking water,
contains radioactivity at levels higher than previously known, and far higher than the level that federal regulators say is safe for these treatment plants to handle.
Pripyat was looted soon after the accident, and since everything here is radioactive, all the things that were stolen and sold have
spread radioactivity all over the former Soviet Union.
The CDMS experiment is, expressed simply, nothing more than a cylindrical icebox covered with shielding and placed in a clean room to keep naturally
occurring radioactivity from contaminating it.
There is not
enough radioactivity in the core to account for this, so scientists now speculate that the planet may either be shrinking at the rate of a few centimetres a year, or that the vast quantities of helium in the atmosphere are separating out from the hydrogen and slowly sinking.
The Federal and State laws require us to «hold» or hospitalize a cat
until radioactivity levels emitted are too low to be harmful (typically a matter of 3 - 4 days).
ii) Utilization of Nuclear weapons of mass destruction means the use of any explosive nuclear weapon or device or the emission, discharge, dispersal, release or escape of fissile material emitting a level of
radioactivity capable of causing incapacitating disablement or death amongst people or animals.
I was initially worried that the radiation around those vehicles would be very high, as metal
absorbs radioactivity better, but it wasn't.
But Salam, a practicing Muslim and one of the physicists to mathematically unify two of the fundamental forces of nature — electromagnetism and the weak force, which
governs radioactivity — identified with Polkinghorne's quest.
The half - lives (the period in which
radioactivity halves) of these atoms range up to tens of thousands of years, a feature that led U.S. government regulators to require that the planned high - level nuclear waste repository at Yucca Mountain in Nevada isolate spent fuel for over 10,000 years.
After working closely with her mother, Irène went on to win a Nobel prize for her work on
artificial radioactivity in 1935, in collaboration with her own husband.
But the town itself has long since dropped below, as
radioactivity decayed and workers removed contaminated soil and vegetation.
Unlike with an oil spill, they won't actually break up the contamination, says Stamets, but rather hyper - accumulate
radioactivity so they can be collected and disposed of safely by encasing them in glass or other protective materials.
The technique relies on the radioactive isotope carbon - 14, whose
radioactivity diminishes over time in a predictable manner, allowing researchers to calculate the age of ancient human sites using charcoal from fires or the bones of the prehistoric humans themselves.
Performed surveys for contamination and radiation control,
airborne radioactivity control and surveys to categorize waste for shipment.
Phrases with «radioactivity»