Background radiation refers to the amount of radiation to which a person is exposed from natural sources. Natural sources of background radiation include radioactive substances in the soil, cosmic radiation originating in outer space, and naturally occurring radionuclides deposited in the human body. On average, a person in the United States gets a dose to the thyroid of approximately 100 millirad per yer from background radiation.
Radiation that comes from natural sources and is always present in the environment. This includes solar and cosmic radiation as well as radioactive elements in the ground, building materials, and the human body. Average annual dose of background radiation for an American is about 360 millirems.
the radiation that has always been present in the environment and is produced by natural sources such as cosmic rays and radioactive elements in the ground, building materials and the human body.
Radiation that is emitted from the naturally occurring radioactive materials in the earth and from the cosmic rays that bombard the earth from outer space.
Radiation resulting from cosmic rays and naturally occurring radioactive material. Background radiation is always present, and its level can change with altitude and the amount of radioactive material present in soil and building materials.
The radiation of man's natural environment, consisting of that which comes from cosmic rays, the naturally radioactive elements of the earth and the impact of the cumulative deposition from stratospheric fallout and nuclear accidents such as Chernobyl. Term may also mean radiation extraneous to an experiment.
This comes from five main sources: Food and drink Human activity Cosmic rays Rocks and Soil Radon
the background of radiation from the Universe is strongest in the frequency range 3 x 108 to 3 x 1011 Hertz and was first discovered to be coming from all directions in the sky in 1965. It is believed to be the cosmologically redshifted radiation released by the Big Bang itself.
The naturally occurring nuclear radiation coming from outer space as cosmic radiation, or from naturally occurring radioactive atoms such as uranium and radium in the materials of the earth.
Radiation due to sources other than the sample, such as cosmic rays, radioactive materials in the vicinity of a detector or radioactive components of the detection system other than the sample.
radiation coming from sources other than those being observed
naturally occurring (i.e. non-enriched) radiation in the world around us to which humans are exposed constantly, including radiation from the sun, bricks, the earth, and naturally occurring radioactive isotopes in food.
ionizing radiation from natural sources, such as terrestrial radiation due to radionuclides in the soil or cosmic radiation originating in outer space.
Radiation that occurs naturally in the environment from cosmic rays and radon or from atomic tests carried out by man.
Normal radiation present in the lower atmosphere from cosmic rays and earth sources. Background radiation varies with location, depending on altitude and natural radioactivity present in the surrounding geology.
The radiation of man's natural environment originating primarily from the naturally radioactive elements of the earth and from the cosmic rays. The term may also mean radiation extraneous to an experiment.
Radiation arising from sources other than the one directly under consideration. Radiations are always present due to cosmic rays and natural radioactivity of substances in the earth and building materials.
Background radiation is the low-level radioactivity that is around us all the time. There are many sources that contribute to the background radiation including the ground, the air, and space. Nuclear Breakdown
Radiation arising from natural radioactive materials always present in the environment, including solar and cosmic radiation and radioactive elements in the upper atmosphere, the ground, building materials, and the human body.
Radiation arising from natural sources in the environment. The main sources of ionizing radiation in the environment are: from radon gas in the air, radiation from rocks and soil, radiation from radioactive materials in the body and cosmic radiation. The annual dose equivalent from natural background radiation sources in Toronto, Ontario is approximately 300 mrem (3 mSv).
Ambient radiation from outer space [cosmic] and materials found at the surface of the earth.
Ionizing radiation arising from sources other than the one directly under consideration. Background radiation due to cosmic rays and the natural radioactivity of materials in the earth and building materials is always present.
ionizing radiation arising from radioactive material other than the one directly under consideration. Background radiation due to cosmic rays and natural radioactivity is always present. There may also be background radiation due to the presence of radioactive substances in other parts of the building, in the building material itself, etc. charged particle emitted from the nucleus of an atom during radioactive decay. A negatively charged beta particle is identical to an electron. A positively charged beta particle is called a positron.
The natural radioactivity in the environment. Natural background radiation consists of cosmic rays, filtered through the atmosphere from outer space, and radiation from the naturally radioactive elements in the earth (primarily uranium, thorium, radium and potassium). The average American receives about 360 millirem per year from natural and man-made radiation.
The radiation in the natural environment including cosmic rays and radiation from the naturally radioactive elements, both inside the bodies of humans and animals. It is also called natural radiation.
Radiation that occurs naturally in the environment. Background radiation consists of cosmic radiation from outer space, radiation from the radioactive elements in rocks and soil, and radiation from radon and its decay products in the air we breathe.
Radiation that occurs naturally. In central Missouri, natural background radiation is about 295 millirems per year.
Naturally occurring radiation which every person is exposed to, resulting from radiation from the Earth’s crust and cosmic rays.
Radiation in the natural human environment originating from cosmic rays and from the naturally radioactive elements of the earth, including those within the human body. The level of radioactivity in an area which is produced by sources other than the one of specific interest.
Low level radiation from small amounts of radioisotopes in the surrounding soil, water, atmosphere, buildings, etc.
The radiation found in the natural environment originating primarily from the naturally radioactive elements of Earth and from cosmic rays. The term may also mean radiation extraneous to an experiment.
Background radiation is the microwaves permeating the universe that are probably the remnants of the Big Bang. This background radiation accounts for a temperature of 2.7 K in space.
There is a natural level of ionising radiation in the environment, to which everything is exposed to a greater or lesser extent and for the majority of people it is the major source of radiation exposure. This natural radiation comes from a number of sources, for example cosmic rays from outer space, radioactive elements naturally present in rocks, soils, building materials and in the food and drink that we eat.
Nuclear (or ionizing) radiations arising from within the body and from the surroundings to which individuals are always exposed. The main sources of the natural background radiation are potassium-40 in the body, potassium-40 and thorium, uranium, and their decay products (including radium) present in rocks and soil, and cosmic rays.
Ratiation extraneous to an experiment. Usually the low-level natural radiation form cosmic rays and trace radioactive substances present in our environment.
the radiation present in the natural environment, including cosmic rays and other radiation from elements around and within the bodies of humans and animals.
Radiation from radioactive sources all around us, some of them natural and some of them artificial. Radioactivity
Radiation is a part of our natural world. People have always been exposed to radiation that originates from within the Earth ("terrestrial" sources) and from outer space ("cosmogenic" or "galactic" sources). back to
Radiation arising from radioactive material other than that under consideration. Background radiation due to cosmic rays and natural radioactivity is always present; background radiation may also be due to the presence of radioactive substances in building materials.
The natural ionizing radiation of man's environment, including cosmic rays from outer space, naturally radioactive elements in the ground, and naturally radioactive elements in the human body.
Naturally occurring radiation is always present, it includes high energy gamma rays from the sun and outer space and alpha, beta, and gamma radiation emitted from elements in the earth.
The naturally-occurring ionising radiation which every person is exposed to, arising from the earth's crust (including radon) and from cosmic radiation.
means radiation from cosmic sources; naturally occurring radioactive materials, including radon (except as a decay product of source or special nuclear material) and global fallout as it exists in the environment from the testing of nuclear explosive devices. "Background radiation" does not include radiation from source, byproduct, or special nuclear materials regulated by the Nuclear Regulatory Commission.
Radiation (at a typical rate of 60-100 mrem per year) coming from space or from the earth. It can be both natural and man-made.
Background radiation is the ionizing radiation emitted from a variety of natural and artificial radiation sources.