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27 Cards in this Set
- Front
- Back
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binding energy
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amount of energy required to remove an atom from a given shell that must exceed electrostatic force of attraction with the nucleus
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highest energy shell
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k
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process by which a neutral atom gains or loses an electron
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ionization
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radiation
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transmission of energy through space or matter
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particulate radiation
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made of particles that have mass and energy + or - and move at high speeds
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beta particles
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e- released from decayed material
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man made "rays"
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cathode rays
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electromagnetic radiation
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movement of energy through space as a combination of electric and magnetic fields
no mass no charge |
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high energy...
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SHH
HIGH energy short wavelength high freq |
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wavelength
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distants from point to point
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frequency
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number of waves passing a point in a unit time
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equation speed of light =
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wavelength/freq
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radiation is depicted as small bundles of energy called
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photons
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the xray tube contains..
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cathode -
anode + |
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explain the cathode side
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the cathode has a tungsten filament which is the source of the e-. current flows through increase the heat and increases the - release
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anode description
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the anode (+) has a tungsten target and a cooper stem (thermal conductor, dissipates heat from the tungsten
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tungsten target
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used for its high MP and thermal conductivity. converts kinetic energy of the e- to photons
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focal spot in the middle of the tungsten target
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place the xrays are generated
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smaller the ___ spot the..
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effective focal spot the sharper the image
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as the focal spot size decreases..
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sharpness increases
heat per unit target area increases need to be small enough for sharpness but large enough the disperse heat |
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how much of the energy is heat and how much xray
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xray = 1%
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aluminium filter in the gun filters..
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out low energy photons
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altenrating current
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E- flow in alternating directions cathode> anode then the nonfunctional anode to cathode
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mamp button
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controls the temp of the filament, how much e- are released. limits current of AC power
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kvp measures
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how fast the e move
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impulse equation
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n impulses = n/ 60sec
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2 kinds of radiation in that 1% x ray
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bremsstrahlung radiation: breaking radiation , pirmary source of radiation from an x ray
characteristic radiation |
