radioactive decay


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Related to radioactive decay: alpha decay, half life, radioactivity

radioactive decay

the disintegration of the nucleus of an unstable nuclide by the spontaneous emission of charged particles, photons, or both.

radioactive decay

The continual loss of energy by radioactive substances. Disintegration of the nucleus by the emission of alpha, beta, or gamma rays eventually results in the complete loss of radioactivity. The time required for some materials to become stable may be minutes and, for others, thousands of years.
See: half-life
See also: decay

radioactive

characterized by radioactivity.

radioactive decay
spontaneous decomposition of the nuclei of the atoms of radioactive substances. Measured as the proportion of the atoms in a radionuclide that decompose per unit of time, usually stated as the half-life of that particular isotope.
radioactive fallout
dissemination of radioactive substances through the atmosphere and deposition on the environment generally; causes radiation injury.
radioactive isotope
radionuclide. A radioactive nuclide, e.g. radioactive iodine or strontium.
radioactive tracer
see radioactive tracer.
References in periodicals archive ?
On 4 Dec 2002, a total solar eclipse occurred, during which the radioactive decay rate of Co-60 was measured at Pittsburg State University in southeastern Kansas [17], and the radioactive decay rate of Po-210 [18] was measured in the Boston area, both at/near the time of totality in southern Australia.
Shnoll our own work whereby at my request, colleagues had measured a dip in the radioactive decay of Co-60 in southeastern Kansas, and in Po-210 in the Boston area at the time of the total solar eclipse of 4 December, 2002, when the "umbra" passed closest to the isotope sources [7].
Radiocarbon dating of ancient organic material is based on the radioactive decay of [sup.
Lessons will include collecting experimental data on radioactive decay, determining the half-life of an isotope both algebraically and graphically, and comparing the results of the two methods.
There,he was able to develop his understanding of nuclear physics,particularly radioactive decay.
After correction for radioactive decay, we found very little difference between the two time intervals, indicating that GNAIW reached CPDW and there was essentially no change in the rate of the global "conveyor belt" circulation.
How did a young woman's body wind up at the bottom of a lake--and what do wedding cake ingredients, soil samples, radioactive decay, bone age, blood stains, bullet matching, and drug lab evidence reveal about whodunit?
The researchers estimated the ages of samples by measuring the ratio of two forms of argon gas, a number that represents the amount of radioactive decay of potassium to argon in a sample over time.
Neutrinos are elementary particles created through radioactive decay that pass quickly through matter.
Our efforts will also reveal the properties of electromagnetic counterparts of neutron star mergers, which are powered by the radioactive decay of the synthesized elements.
The Higgs boson was first proposed as a theoretical particle in the 1960s as an answer to the question of why other subatomic particles have mass, and why electromagnetic force has a much longer range than the weak nuclear force, which is responsible for radioactive decay.