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Chapter 12: X-rays - Coggle Diagram
Chapter 12: X-rays
Production of X-Rays
Phenomenon
When fast-moving electrons slam into the metallic object it loses their speed the kinetic energy is low and then transforms into X-rays.
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Procedure
- Electrons are emitted when the filament(cathode) is hot
- When the high voltage d.c. supply connected, electron collides the target(anode) at high speed.
- The high-speed electron collides the metal target(anode), X-Rays produced
- Less than 1% of the total energy of the colliding electrons is converted into X-rays, others will be converted into heat energy
X- Rays Spectrum
Type
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Continuous spectrum
- The electron usually has more than one encounter before it loses all its energy.
- Different electrons lose different amounts of energy, so a continuous spectrum covering a range of wavelength is obtained.
From Graph
Relation
- Intensity of X-rays ↑, Number of electrons hitting the target ↑
- As more heat energy, △T affected
- Voltage ↑, Energy of electrons ↑, More energy available for X-rays production
- Area under the graph is equal to the total intensity of X-rays
- These peaks are characteristic line spectrum.
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Bragg's Law
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\[\textrm{Discover largest order, }n<=\frac{2d}{\lambda}\]
Properties of X-Rays
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Short wavelength, High frequency
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