| What
assumptions are made? |
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| Photoelectron
or Auger electron yield is proportional in |
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| some
way to the quantity of that material in the surface |
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| - basic expressions suggest this |
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| Surface
is Homogeneous |
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| - is it? |
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| Sensitivity
Factors are correct and understood |
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| - are they? |
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| Instrumental
Factors are understood (transmission |
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| functions…) |
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| - are they? |
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