radioactivity is

Frederick Soddy ( 2 September 1877 – 22 September 1956 ) was an English radiochemist and monetary economist who explained, with Ernest Rutherford, that radioactivity is due to the transmutation of elements, now known to involve nuclear reactions.

Humanity has retreated into deep underground cities, but the radioactivity is slowly affecting them as well, with mankind's extinction estimated in one year.

Processing of substances containing natural radioactivity is often known as NORM.

Chaotic radioactivity is the next explanatory challenge for physicists supporting determinism

Becquerel's discovery of radioactivity is a famous example of serendipity, of how chance favors the prepared mind.

* 1903 – George Darwin and John Joly claim that radioactivity is partially responsible for the Earth's heat

The main source of radioactivity is cobalt-60 with a half-life of 5. 27 years, hence it is reduced by a factor 193 in 40 years.

an atomic mass of 39. 963 g / mol, so the radioactivity is 32 kBq.

The radioactivity is evenly distributed throughout the particle volume, making total activity of the particles linearly dependent on particle volume.

He noted that this process possibly can explain where the energy of radioactive substances is coming from-however, he stated that an internal cause of radioactivity is more probable.

Local environmental groups have voiced concerns about the radioactivity levels of the cooling water of both these nuclear sites, which is being flushed into the bay of Vauville ; however, the emitted radioactivity is several orders of magnitude below natural background levels and does not pose any hazard.

* George Darwin and John Joly claim that radioactivity is partially responsible for the Earth's heat.

However, the radioactivity is a major concern for people involved with the manufacture of mantles, and an issue with contamination of soil around some former factory sites.

The amount of radioactivity is proportional to the serum IgE for the allergen.

Earth's radioactivity is explained here as the result of an unspecified nuclear war.

First, radioactivity is expressed as the decay rate of a particular radionuclide with decay constant λ and the number of atoms N:

Access to areas of land contaminated with radioactivity is likely to be restricted until 2300.

With metal fuel, the cladding is not breached and no radioactivity is released even in extreme overpower transients.

No radioactivity is required or created in the process.

Because some radioactivity is present everywhere ( i. e., background radiation ), the spectrum should be analyzed when no source is present.

A January 2005 report by the DOE stated that radioactivity levels were normal at the surface and in groundwater, though a later report due in 2007 is expected to more fully explore if there is subsurface contamination and whether or not radioactivity is still spreading outward from the blast site itself.

In these experiments stable phosphorus is replaced by the chemical identical radioactive P-32, and the resulting radioactivity is used in analysis of the molecules and their behaviour.

In these uses, its radioactivity is incidental, and generally the least radioactive ( longest lived ) isotopes of Tc are used.

Its specific radioactivity is 1. 885 x 10 < sup > 9 </ sup > TBq / g and has a lifetime of 15. 87 seconds.

Its specific radioactivity is 4. 78 x 10 < sup > 9 </ sup > TBq / g.