Lect12_notes

22120c9de29 b2 b b24 b cbems 164

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Unformatted text preview: quot;'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 12 ! 2 EDS! •  Energy dispersive x-ray spectroscopy (spectrometry?) •  Microchemical analysis of extremely small volumes of material •  Almost every SEM now equipped with EDS CBEMS 164 – XRD, SEM & Microanalysis: Lecture 12 ! 3 CBEMS 164 – XRD, SEM & Microanalysis: Lecture 12 ! 4 EDS X-Ray Detectors! •  EDS detectors now ubiquitous •  Liquid nitrogen cryogenic cooling required New Technology! •  Silicon Drift Detector –  SDD –  Faster acquisition rate –  No LN2 required •  Li-drifted Si detector –  Si(Li) –  Needs LN2 cooling CBEMS 164 – XRD, SEM & Microanalysis: Lecture 12 ! 5 White...
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