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When filament electrons strike the anode target what is the small distance that they penetrate?
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Characteristic
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Physics module 8
| Question | Answer |
|---|---|
| When filament electrons strike the anode target what is the small distance that they penetrate? | About 0.5mm |
| Characteristic | The result that occurs when an electron in an inner shell is knocked from its orbit by a projectile electron. |
| Bremsstrahlung | The result occurring when a projectile electron enters an atom in the metal of the anode and does not strike any of that atom's electrons but continues toward the center of the atom and comes near the nucleus. |
| Photon | A packet of energy that has no mass; all electromagnetic energy, including light and x-rays, is in the form of photons. |
| Binding energy | The energy that holds protons and neutrons together in the nucleus through the force of attraction; the amount of energy needed to break up the nucleus. |
| The electron binding energy varies from element to element and, if used as a target for x-ray production, would change characteristic production. T or F? | True |
| In a characteristic interaction, only one vacancy is created and filled per atom. T or F? | False |
| At what point is a characteristic photon created? | When a shell vacancy is filled |
| What is the average energy of Bremsstrahlung photons? | one-third of the kVp selected at the control panel |
| if 60 kVp is selected on a control panel, what will the beam be made up of? | Brems only |
| What is the average energy of a beam produced at 60kVp? | 20kVp |
| If a filament electron enters an atom with 80keV, passes the nucleus and exits with 70keV of energy, What is produce? | 10keV brems photon |
| If a filament electron passes through an atom and leaves with the same energy it entered with, what is produced? | Nothing |
| What causes a brem photon to be produced? | Attractive force between a filament electron and the nucleus |
| Spectrum | A continuum of electromagnetic energy, including light, x-rays, and radio waves, listed in order of energy, frequency, and wavelength |
| Added filtration | The use of filters, such as aluminum plates, positioned in the beam's path to remove low-energy x-rays that are of no value for imaging. |
| Which portion of the discrete emission spectrum is represented on the x-ray emission spectrum? | K characteristic |
| What will a change in the kVp do to the height of the spectrum? | Reduction of the height in the spectrum and a shift to the left |
| What happens to filament electrons after they interact with atoms? | 1) fill a shell vacancy in an atom 2) Become part of the current through the tube |
| Only L shell electrons can fill K shell vacancies. T or F | False |
| If filling a K shell vacancy, Which shell electron would produce the highest characteristic photon? | O shell |
| characteristic photons are produced with the filling of each shell vacancy. T or F? | True |
| L characteristic originates from which of the following shells being filled? N, M, L, K | L |
| As the distance between the filament electron and nucleus gets smaller, what happens to the brems photon energy? | Increases |
| Brems is the interaction that occurs more often. T or F? | True |
| Where is the discrete line placed on an x-ray emission spectrum for a tungsten target? | 69 |
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volcomgrl12