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.

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References in periodicals archive ?

The average individual dose received from background radiation is approximately 3.

The fallacy of comparing diagnostic radiation with background radiation; and the need to learn from past mistakes

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.

Weigh the risks and benefits of cardiac imaging studies: as the use of radiation in diagnosing heart disease rises, experts call for judicious use of these tests in the appropriate patients

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).

The health effects of low-dose ionizing radiation

One of these unique capabilities is the ability to conduct aerial background radiation surveys.

Combating Nuclear Terrorism: Federal Efforts to Respond to Nuclear and Radiological Threats and to Protect Key Emergency Response Facilities Could Be Strengthened

2 per cent of the background radiation to which we are all subject.

The fallout from nuclear power

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.

1000 words: Josiah McElheny; Talks about An End to Modernity and Conceptual Drawings for a Chandelier, 1965, both 2005

This is a delayed coincidence experiment, so only accidental coincidences from background radiation will appear as background events in the data.

Proposed measurement of the beta-neutrino correlation in neutron decay

Theorists in the 1960s said seeds of galaxies could be seen as ripples in the Cosmic Microwave Background radiation from the Big Bang.

Findings looking Bang on

It uses a single radioisotope x-ray source, ensuring that the measurement is virtually unaffected by interference from background radiation.

X-ray fluorescence handheld analyzer

This afterglow is called cosmic microwave background radiation.

Hey, baby! (Space/Big Bang Theory)

The expanding universe demoralized them, and the 3K background radiation devastated them.

Big space/little space. (Letters to the Editor)

The White Hole model also accounts for the cosmic background radiation and the flat nature of the universe, because it expands forever.