X-ray_Crystallography_F11

X-ray_Crystallography_F11 - X-ray Crystallography GLY 4200...

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1 X-ray Crystallography GLY 4200 Fall, 2011
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Discovery of X-rays Wilhelm Conrad Roentgen discovered x- radiation in 1895 In 1912, Friedrich, Knipping, and von Laue demonstrated diffraction of x-radiation passing through a crystal The wavelength of x-radiation ranges from 10 -6 to 10 -1 nm 2
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3 Einstein Equation E = hυ = hc/λ where E = energy h = Planck's constant υ = frequency c = speed of light λ = wavelength.
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4 Conversion to Kinetic Energy If all the kinetic energy of an electron is converted to X-ray quanta, we can rewrite the equation as: eV = hc/λ Replacing constants gives: λ(nm) = 1.24/kV Where kV = kilovolts
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5 White Radiation Effect of excitation potential on minimum wavelength
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6 X-ray Tube X-ray tube schematic diagram
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7 Electron Shells Electron infall from outer to inner shells
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8 Copper X-ray Spectrum
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9 Copper Energy Levels Energy-level diagram for electron transitions in Cu
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10 Copper X-ray Spectrum
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11 Absorption Edge Absorption edge of Ni in relation to the emission spectrum of Cu
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12 Scattering Scattering of X- rays by a row of equally spaced, identical atoms
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13 Reflection Condition for reflection
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14 Path Difference Path difference = 2d sin θ
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This note was uploaded on 12/12/2011 for the course GLY 4200c taught by Professor Warburton during the Fall '10 term at FAU.

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X-ray_Crystallography_F11 - X-ray Crystallography GLY 4200...

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