background radiation


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Related to background radiation: cosmic background radiation

back·ground ra·di·a·tion

irradiation from environmental sources, including the earth's crust, the atmosphere, cosmic rays, and ingested radionuclides.

background radiation

Etymology: AS, baec + OE, grund, ground
naturally occurring radiation emitted by soil, groundwater, building materials, radioactive substances in the body (especially potassium 40), and cosmic rays from outer space. Each year the average person is exposed to 44 millirad (mrad) of external terrestrial radiation, 18 mrad of naturally occurring internal radiation, and 44 mrad of cosmic radiation. Background radiation levels may vary in different locales.

background radiation

The amount of ionising (electromagnetic) radiation to which a person is exposed from natural sources, including terrestrial radiation due to natural radionuclides in the soil (e.g., radon), cosmic radiation and fallout in the environment from anthropogenic sources.

background radiation

Radiation The amount of ionizing-electromagnetic radiation to which a person is exposed from natural sources including terrestrial radiation due to natural radionuclides in the soil–eg, radon, cosmic radiation, and fallout in the environment from anthropogenic sources. See Radon.

back·ground ra·di·a·tion

(bak'grownd rā'dē-ā'shŭn)
Irradiation from environmental sources, including the earth's crust, the atmosphere, cosmic rays, and ingested radionuclides in the body.

back·ground ra·di·a·tion

(bak'grownd rā'dē-ā'shŭn)
Irradiation from environmental sour-ces, including the earth's crust, the atmosphere, cosmic rays, and ingested radionuclides.

background radiation

the inescapable radiation received by the entire population due mostly to cosmic radiation, but also due to naturally occurring radioactive materials in the terrestrial environment and to internal isotopes.
References in periodicals archive ?
The average individual dose received from background radiation is approximately 3.
RADIATION DOSES: A COMPARISON Typical Equivalent effective period Number of Radiation source dose (in of background drest X-rays millisieverts) radiation (PA & lateral Background radiation 3 mSv 1 year 30 Chest X-ray 0.
In 1980, Cohen reported total cancer mortality rates were inversely related to background radiation for the United States population, which was then around 200 million (Figure 2c).
2 per cent of the background radiation to which we are all subject.
And it just so happens that 1965 was also the year of the discovery of cosmic background radiation, the first physical evidence of the big bang, which made front-page news.
This is a delayed coincidence experiment, so only accidental coincidences from background radiation will appear as background events in the data.
Theorists in the 1960s said seeds of galaxies could be seen as ripples in the Cosmic Microwave Background radiation from the Big Bang.
It uses a single radioisotope x-ray source, ensuring that the measurement is virtually unaffected by interference from background radiation.
This afterglow is called cosmic microwave background radiation.
The expanding universe demoralized them, and the 3K background radiation devastated them.
The White Hole model also accounts for the cosmic background radiation and the flat nature of the universe, because it expands forever.