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High Angle Backscattered Electrons and Low Angle Backscattered Electrons

Backscattered electrons emitted from a sample can be captured at angles that are closer to the direction of incident electrons (high takeoff angle) or are farther from the incident electrons (low takeoff angle) by changing the position of the backscattered electron detector. The former is called high angle backscattered electrons, while the latter low angle backscattered electrons. Each provides different types of information.
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