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CH. 2

Radiation Physics

TermDefinition
Electrons with greatest binding shell K-shell
Electrons carry what charge negative
2 or more atoms joined by chemical bonds molecule
Describe ionization atom loses or gains electrons
Radioactivity unstable atoms undergo spontaneous disintegration to become balanced
Types of particulate radiation alpha particles, beta particles, protons
Types of electromagnetic radiation rader waves, x-ray, microwaves
Wavelength distance between wave crest to wave crest
X-rays travel at speed of light
Filament circuit (spiral tuingin cathode) regulates electrical current flow (low voltage circuit)
Step up transformer increases voltage
When high voltage circuit is activated unit signal is activated, electrons from cathode go to anode, heat is produced
X-rays are produced positive anode
Thermonic emission occurs negative cathode
70% of all x-ray energy of anode is general radiation
Characteristic radiation occurs at 70 kVp or higher (very small parts of x-rays produced in unit)
Primary radiation radiation exiting tubehead
Scatter radiation radiation deflected from path by interaction with matter
Most common scatter with dental x-rays Compton
Created by: user-1888637
Popular Dentistry sets

 

 



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