EMS162_2011_Lecture13

EMS162_2011_Lecture1 - Ewald Sphere Yayoi Takamura EMS 162 Winter 2011 24 Ewald Sphere for Laue Diffraction k0(1 Series of spheres for each x-ray

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1 2/15/2011 EMS 162 - Winter 2011 24 Yayoi Takamura Ewald Sphere 2/15/2011 EMS 162 - Winter 2011 25 Yayoi Takamura Ewald Sphere for Laue Diffraction • Each ( hkl ) plane diffracts from an x-ray with different λ Series of spheres for each x-ray wavelength k 0 ( λ 1) k 0 ( λ 1) k 0 ( λ 1)
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2 2/15/2011 EMS 162 - Winter 2011 26 Yayoi Takamura Laue Diffraction Method • First diffraction method used • Uses: Orienting single crystals • Fixed orientation of sample relative to x-ray source and detector • White radiation – Each ( hkl ) plane diffracts from an x-ray with different λ 2/15/2011 EMS 162 - Winter 2011 27 Yayoi Takamura Ewald Sphere k 0 k 1 d hkl Orientation 1 Orientation 2
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3 2/15/2011 EMS 162 - Winter 2011 28 Yayoi Takamura Limiting Sphere • All possible orientations of k 0 and k 1 k 0 k 1 d hkl k 0 k 1 d hkl Limiting sphere 2/15/2011 EMS 162 - Winter 2011 29 Yayoi Takamura Powder Diffraction k 0 k k-k 0 θ 1 θ 1 k 0 k k-k 0 θ 1 θ 1 k 0 k k-k 0 θ 1 θ 1 Sample Surface Planes parallel to sample surface diffract
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This note was uploaded on 04/04/2011 for the course EMS 162 taught by Professor Howitt during the Spring '08 term at UC Davis.

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EMS162_2011_Lecture1 - Ewald Sphere Yayoi Takamura EMS 162 Winter 2011 24 Ewald Sphere for Laue Diffraction k0(1 Series of spheres for each x-ray

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