X-Rays (2) Flashcards

1
Q

X-Rays

A

The product of an energy transfer between a high-speed electron and a dense test material.

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2
Q

How are X-Rays controlled?

A

A Generating Machine (X-Ray tube) which is controlled electrically.

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3
Q

How do we generate X-Rays?

A

Acceleration of an electron and decelerated rapidly, due to an interaction with other atomic particles.

  • Source of electrons (heated wire filament)
  • Way to accelerate electrons (voltage)
  • Target to receive electron impact
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4
Q

Why do we need a cooling system in an X-Ray Tube?

A

Only 2% of the energy generated produces X-Ray radiation the remaining 98% is in the form of heat.
- Without cooling the tube would “burn-out”

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5
Q

Atomic Processes/Types of X-Rays

A
  • Characteristic X-Rays

- Bremsstrahlung X-Rays

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6
Q

Characteristic X-Rays

A

Where the “striking electron” dislodges an electron in the K-shell, causing an electron from the M-shell to replace it releasing energy or a “secondary X-Ray photons” and so on through the shells.
- Energy produced from movement is the difference between energies within shells

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7
Q

Bremsstrahlung X-Rays

A
  • German word means braking
    When an electron strikes an atom and is slowed down by the binding forces as it passes, giving off some of its energy (an X-Ray photon and heat)
  • Amount of energy produced is random, depending on difference between energy from the original velocity and slowed velocity.
  • Most X-Rays are produced this way
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