radioactivity
radioactivity
definition
noun
Early studies of radioactivity revealed that certain atomic nuclei were naturally radioactive.
the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
example
The devices could be equipped with sensors that detect various substances, from heat to chemicals or 'radioactivity' .
What makes dirty bombs particularly troublesome is that 'radioactivity' , like fire, is something we deal with on a daily basis.
The becquerel is a unit of 'radioactivity' and corresponds to one radioactive disintegration per second.
Small amounts of 'radioactivity' escaped into the atmosphere.
The Bequerel is a unit of 'radioactivity' , which is equivalent to the number of radioactive particles detected per second.
The most common ill effects of exposure to 'radioactivity' result from the ionization of water molecules by the radiation.
The idea that radioactive isotopes can be used for dating purposes is almost as old as Henri Becquerel's discovery of 'radioactivity' itself in 1896.
an escape of 'radioactivity'
Its functions relate principally to the monitoring of 'radioactivity' in the environment and of radiation doses received by Irish people in the course of their work.
Over the six decades of the lab's operation, 'radioactivity' has leaked in unknown quantities into the water and vegetation surrounding the facility.
The 60 cities with federally reported dietary levels of 'radioactivity' are often not proximate to nuclear sites.
In the first five years, the reactors will undergo mild surface-level deactivation to minimize their 'radioactivity' .
This year is the centennial of the Nobel Prize in Physics shared by Henri Becquerel and the Curies for their pioneering work on 'radioactivity' .
So sensitive is the detector that a single speck of dust within it could emit enough natural 'radioactivity' to queer the readings.
Indeed, many isotopes spontaneously convert to other elements through 'radioactivity' .
They may also interact with nonmedical regulations, such as limits on electromagnetic emissions or 'radioactivity' .
The lack of safeguards is leaving thousands of children across central Scotland at risk of thyroid cancer following an escape of 'radioactivity' .
Scientists can compare the number of breakdowns in any given time and the intensity of the 'radioactivity' among elements and isotopes.
One example he gave was the leakage of 'radioactivity' from Sellafield caused by pigeons.
The Curies resolved to learn as much as they could about the source of 'radioactivity' in pitchblende, the ore with which Becquerel originally worked.
TL is based on the continual accumulation of stored energy as a function of natural 'radioactivity' .
A station opened in the Chatham Islands to monitor 'radioactivity' , will help police the worldwide ban on Nuclear Weapons Testing.
Pierre and Marie Curie called Becquerel's radiation 'radioactivity' .
It is suspected that workers have brought home tiny particles of 'radioactivity' attached to their clothing or their skin.
The results also point the way to the first direct measurements of the total 'radioactivity' of the earth.
The technique is based on the detection of 'radioactivity' emitted after a small amount of a radioactive tracer is injected into a peripheral vein.
Early studies of 'radioactivity' revealed that certain atomic nuclei were naturally radioactive.
Their temperature ranges between 27°C and 51°C and they vary in 'radioactivity' and fluorine content.
When this occurs, the electron shoots out of the atom and is called a beta particle, a type of 'radioactivity' .
He is one of nine authorities which have been supplied with the latest equipment for recording and detecting 'radioactivity' after an atomic bomb explosion.
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