Which treatment energy for electrons is most likely to use a scanning beam technique rather than a scattering foil?

Name: Which treatment energy for electrons is most likely to use a scanning beam technique rather than a scattering foil?
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Question

Quizplus · Accepted Answer

Scanning beams are especially useful above 25 MeV, when the thickness of the required scattering foils would result in difficulties with their mechanical size and would cause problems with electron contamination.

Which Treatment Energy for Electrons Is Most Likely to Use