X-ray generation
Electron interacts wwith matter, ionises atom, electron fills space and produces characteristic x-rays
Electron yield
- Highest portion--> secondary electrons
- Independent of atomic number
- Smaller portion --> Back scatter electrons ;
- increases with increasing atomic number
- Better contrast in image than SE if have varying atomc number in sample
- As Some BS electrons form diffraction patterns , based on crystaollographic arrangemnet
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