what are gamma rays detected by?
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Gamma-rays are detected by observing the effects they have on matter. A gamma-ray can do a few basic things with matter. It can collide with an electron and bounce off it like a billiard ball (Compton scatter) or it can push an electron to a higher energy level (photoelectric ionization).
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Gamma radiation consists of particles shooting out from the nucleus, where light are waves. Gamma radiation is also an electromagntic radiaton as light is, however, at a much higher frequency O Gamma radiation is also an electromagntic radiaton as light is, however, at a much longer wavelength..
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Geiger counters are commonly used to measure the amount of radioactivity, but there are other types of detectors that may be used.
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Gamma rays are emitted from radioactive forms of the element cobalt (Cobalt 60) or of the element cesium (Cesium 137). Gamma radiation is used routinely to sterilize medical, dental, and household products and is also used for the radiation treatment of cancer.
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Cosmic gamma rays are difficult to detect for at least two reasons: (1) there are not many of them compared to other things that "look" like cosmic gamma rays to a detector, but aren't; and (2) they have so much energy that it is hard to "capture" one at all!
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So they are different beasts. For one thing, gamma rays are high energy photons (like light) and cosmic rays are high energy particles (like protons). So they are different beasts. Cosmic rays, on the other hand, are thought to be generated in the shock waves from supernova explosions in our galaxy.
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Gamma rays are a radiation hazard for the entire body. They can easily penetrate barriers that can stop alpha and beta particles, such as skin and clothing. Gamma rays have so much penetrating power that several inches of a dense material like lead, or even a few feet of concrete may be required to stop them.
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A gamma camera is a machine that is able to detect and make images from the very small amounts of ionising radiation emitted from patients having a nuclear medicine study. The gamma camera usually has a table, often narrow, on which the patient lies. The images are taken using the camera 'head'.
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Gamma rays are the most energetic form of electromagnetic radiation, with a very short wavelength of less than one-tenth of a nanometer. Gamma radiation is the product of radioactive atoms. Depending upon the ratio of neutrons to protons within its nucleus, an isotope of a particular element may be stable or unstable.
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There are three types of radiation: alpha particles, beta particles and gamma rays. Beta particles can be blocked by a sheet of aluminum, but gamma rays require several inches of lead, concrete or steel to be stopped.
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Gamma rays are nuclear in origin and are defined to include the highest-frequency electromagnetic radiation of any type.
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A Geiger counter (Geiger-Muller tube) is a device used for the detection and measurement of all types of radiation: alpha, beta and gamma radiation. Basically it consists of a pair of electrodes surrounded by a gas. The electrodes have a high voltage across them.
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Prompt gamma rays are those emitted during or immediately after the fission event. This is in contrast to delayed gamma rays which result from beta decay of fission products.
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Fortunately, gamma rays from space are absorbed by Earth's atmosphere before they can reach the surface. Q: Predict how gamma rays might affect living things on Earth if they weren't absorbed by the atmosphere. A: Gamma rays would destroy most living things on Earth because they have so much energy.
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A large fraction of astronomical gamma rays are screened by Earth's atmosphere. Gamma rays are ionizing radiation and are thus biologically hazardous. Due to their high penetration power, they can damage bone marrow and internal organs.
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Gamma rays are high energy electromagnetic waves. They can easily pass through medical equipment, such as syringes. Radiation is used to sterilize medical instruments by putting a clean, instrument in an air-tight bag.
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Gamma rays are a form of electromagnetic radiation (EMR). They are the similar to X-rays, distinguished only by the fact that they are emitted from an excited nucleus.