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 ?
stated: "However, the frequency of a few special diseases like cancer and cardiac disease in the HBR (high background radiation) residents was less than that in the area with ordinary background radiation (P= 0.
This observation led Stewart to infer that while about 7% of all childhood cancers for 1950-1980 were associated with prenatal X-rays (declining thereafter with declining doses), more than 70% were associated with unavoidable in utero exposures to natural background radiation (Knox et al.
The new scintillating bolometer has performed excellently, proving its viability as a detector in experiments to look for dark matter, and also as a gamma spectrometer (a device that measures this type of radiation) to monitor background radiation in these experiments", said Abancens.
This chart includes all known ranges of EMR including: gamma rays, X-rays, ultraviolet light, visible light, infrared, microwaves, radio waves (ULF, VLF, LF, MF, HF, long, short, HAM, VHF, UHF, SHF, EHF), cosmic microwave background radiation and brain waves, all organized by octaves.
And the average annual background radiation dose in the United States is 300 mrem, according to the Committee on the Biological Effects of Ionizing Radiation (BEIR).
While several previous follow-up studies on the TMI population have been conducted in the past, this one is the most extensive due to its longer, 13-year time-frame and the use of information about residents' lifestyles (such as smoking habits and education levels) and everyday background radiation exposure beyond what was caused by the TMI incident.
To best understand how our universe formed and has evolved, different approaches are being used, including measuring the cosmic background radiation, studying galaxy clusters, and understanding quasars (super massive black holes) and their relation to large-scale structure in the universe.
The Wilkinson Microwave Auisotropy Probe (WMAP), which measures the cosmic background radiation, is in orbit there.
At doses near natural background radiation levels (approximating many occupational exposure situations), .
Background radiation is naturally occurring and every man, woman and child has this exposure daily.
More rapid clearance time is important in that it can minimize or eliminate confusing background radiation readings in a sentinel node biopsy procedure where the sentinel node is very close to the tumor site.