Lect11_notes

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Unformatted text preview: ,)&*0', 20%)&/%)326&#%20%#$'%'&',-/%+),,"'1%5/%#$'%"&+"1'&#%5')3%'('+#,2&.%,)&-"&-%0,23%)%0,)+#"2& 20%)&%'('+#,2&%<2(#%>"&%8$2&2&%'?+"#)#"2&@%#2%#$'%06((%'&',-/%+),,"'1%5/%#$'%"&+"1'&#%'('+#,2& 20%3)&/%;"(2'('+#,2&%<2(#*%>A"#$%'3"**"2&%20%5,'3**#,)$(6&-%?4,)/*@9%%B('+#,2&%8)#$ 1'<")#"2&*%>)&-('*@%),'%*3)((.%2&%#$'%2,1',%20%C9DE%2,%('**9 B2 $ B;"& B2%4% B CBEMS 164 – XRD, SEM & Microanalysis: Lecture 11 ! 3 Backscatter Interaction Volume as Function of keV! ! ! ! ! ! ! •  Consider simulations of 10,000 trajectories in copper as f(keV) •  20 keV – copper •  5 keV - copper •  1 keV - copper • 20 – 5keV – 10 x reduction in interaction volume • 5 – 1 keV – 10 x reduction in interaction volume • Reject electrons that have lost > 25% energy provides an additional effective interaction volume reduction without losing too...
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