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18 Cards in this Set
- Front
- Back
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classes of interaction: Directly IR (4)
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Alpha, electron, positrons and heavy charged particles
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Classes of interaction: indirectly IR (2)
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neutron, photons
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Primary electric field interactions (3)
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Ionization, Excitation, Bremsstrahlung
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the complete removal of an orbital electron from an atom
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Ionization *
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raising an electron to a higher level
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Excitation
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change in the charged particles direction and accelerated with the emission of X-ray
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Bremsstrahlung
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how do alpha particles travel
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short straight path
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Primary photon interactions (3)
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photoelectric, compton scattering, pair production
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an incident photon with energy is absorbed by an atom. the photon disappears and an electron is ejected from the atom with a kinectic energy equal to the incident photon minus the binding energy of the electron
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Photoelectric effect
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an incident photon undegoes elastic scattering with an orbital electron in which both energy and momentum are conserved. the photon disappears and both an electron and a lower energy photon are ejected from the atom
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Compton Scattering
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an incident photon with an energy 2x the elctrons rest mass energy, is converted into an electron-positron par in the electric field of the nucleus
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Pair production
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Neutron interactions: fast neutron interactions (2)
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Elastic and inelastic scattering
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Neutron interactions: Thermal neutron (2)`
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Radiative capture and fission
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neutron collides with a nucleus, some energy is transferred leaving the nucleus in an excited state. the extra energy is emitted as a gamma-ray
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Inelastic Scattering
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neutron collides with nucleus and there is no change in the total KE of the system. Neutron transfer energy to the nucleus and nucleus recoils. if mass of nucleus is equal to the mass of the neutron, the neutron can lose all of its kinectic energy head on, like a billiard
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Elastic Scattering
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a neutron is captured by the nucleus and one or more gamma ray are emitted.
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radiative capture
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a neutron is captured by the nucleus and the excess energy of the nucleus is given off in the form of a charged particle
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charged particle emission
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thermal neutron is absorbed by a nucleus and forms an excited nucleus
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Fission
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