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Background radiation
Videos
Background radiation is a measure of the level of ionizing radiation present in the environment at a particular location which is not due to deliberate introduction of radiation sources.
Geiger counter displaying 0.17 μSv/h (1.5 mSv/a) under background radiation.
Geiger counter displaying 0.17 μSv/h (1.5 mSv/a) under background radiation.
The weather station outside of the Atomic Testing Museum on a hot summer day. Displayed background gamma radiation level is 9.8 μR/h (0.82 mSv/a) This
The weather station outside of the Atomic Testing Museum on a hot summer day. Displayed background gamma radiation level is 9.8 μR/h (0.82 mSv/a) This is very close to the world average background radiation of 0.87 mSv/a from cosmic and terrestrial sources.
Cloud chambers used by early researchers first detected cosmic rays and other background radiation. They can be used to visualize the background radia
Cloud chambers used by early researchers first detected cosmic rays and other background radiation. They can be used to visualize the background radiation
Displays showing ambient radiation fields of 0.120–0.130 μSv/h (1.05–1.14 mSv/a) in a nuclear power plant. This reading includes natural background fr
Displays showing ambient radiation fields of 0.120–0.130 μSv/h (1.05–1.14 mSv/a) in a nuclear power plant. This reading includes natural background from cosmic and terrestrial sources.
Cosmic ray
Videos
Cosmic rays or astroparticles are high-energy particles or clusters of particles that move through space at nearly the speed of light. They originate from outside the Solar System — from the Milky Way
Background radiation
…deliberate introduction of radiation sources. Background radiation originates from a variety of sources, both natural and artificial. These include both cosmic radiation and environmental radioactivity from naturally occurring radioactive materials (such as radon and radium), as well as man-made medical X-rays, fallout…
Pacini makes a measurement in 1910.
Pacini makes a measurement in 1910.
Increase of ionization with altitude as measured by Hess in 1912 (left) and by Kolhörster (right)
Increase of ionization with altitude as measured by Hess in 1912 (left) and by Kolhörster (right)
Hess lands after his balloon flight in 1912.
Hess lands after his balloon flight in 1912.
Sources of ionizing radiation in interplanetary space.
Sources of ionizing radiation in interplanetary space.