Term
| Two Types of Charged particle radiation |
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Definition
| Fast Electrons and Heavy Charged Particles |
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Term
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Definition
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Term
| Two types of Fast electrons |
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Definition
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Term
| Two types of Heavy Charged Particles |
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Definition
| Fission Fragments, protons, alphas |
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Term
| Two types of uncharged radiation |
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Definition
| electromagnetic and neutrons |
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Term
| two types of electromagnetic radiation |
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Definition
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Term
| two types of neutron radiation |
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Definition
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Term
| 3 principle gamma-ray interactions |
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Definition
photoelectric effect
Compton Scattering
Pair production |
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Term
| Define Photoelectric effect |
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Definition
| the gama strikes an electron from the K electron shell and gives all its energy to the electron. The electron becomes excited and is ejected from the atom. |
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Term
| define Compton Scattering |
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Definition
| a gamma ray strikes an unbound electron and gives a portion of its energy to the electron while being deflected. The electron is referred to as the recoil electron and the angle at which the two depart is the Compton scattering angle. |
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Term
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Definition
| If the electron exceeds 1.022 MeV then possible. Takes place in the coulomb field. gamma ray disappears and is replaced by an electron/positron pair. |
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Term
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Definition
| occurs when an electron and a gama escape both having .511 MeV |
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Term
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Definition
| takes place when two gamas escape at Egamma = 1.022 MeV |
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Term
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Definition
| only one gamma escapes at Egamma = .511 MeV |
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Term
| Explain the process involved in a scintillator |
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Definition
| an incoming photon collides with the detector crystal an an electron is ejected from the valence band to the conduction band. This proceeds to the activation site and deionizes it giving off a photon. the photon is then converted to an electron by a photocathode. This electron is sent to a photomultiplier tube which multiplies the number of electrons present using dynodes. This produces enough signal to be detected by electronics. |
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