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X-ray diffraction methods
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yDiscovery
yMethodsyOriginy
GenerationyInteraction of x-ray withmatter
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DiscoveryyRoentgen
yBariumplatinocyanideyUnknown-x rays
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MethodsyAbsorption
yDiffractionyfluorescence
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y
Theoryinvolved
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originyEMS-0.1 to 100 angstromsyAnalytical purposes-0.7 to 2
angstroms
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GenerationyHigh velocity electrons impinge on
metal target-x rays are generated.
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Bohrs theory of atomic
spectrayK-x ray
yEnergyyFrequency
yExample:cu
yMinimum wavelength
yMoseley equation
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Interaction of x-ray with matteryAbsorption
yScattering & DiffractionyFluorescence
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AbsorptionyBeers law
yWavelength vs mass absorptioncoefficient-series ofdiscontinuties(absorptionedges)
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Scattering & Diffraction
yBraggs law
yn=2dsin
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FluorescenceyWavelength-type of elements
yIntensity-amount of elements
yNon destructive method
yVery little sample
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