Diffuse Scattering - Spallation Neutron Source - Oak Ridge National ...

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Thermal motion-Temperature <strong>Diffuse</strong> <strong>Scattering</strong>- (TDS) -defect of 1st kind • Atoms coupled through atomic bonding • Uncorrelated displacements at distant sites – (finite) • Phonons (wave description) – Amplitude – Period – Propagation direction – Polarization (transverse/compressional) Sophisticated theories from James, Born Von Karmen, Krivoglaz
A little math helps for party conversation • Decrease in Bragg intensity scales like e -2M , where 2M =16p 2 2 sin us 2 q l 2 • Small Big reflections • e -2M shrinks (bigger effect) with (q) Low Temperature High temperature Displacements, u s depend on Debye Temperature D - Bigger D smaller displacements !
Page 1 and 2: Diffuse Scattering • Anticipatory
Page 3 and 4: Presentation concentrates year grad
Page 5 and 6: What you already know- arrangement
Page 7 and 8: If crystal lattice of atoms leads t
Page 9 and 10: You already know length scales are
Page 11 and 12: Who the heck was Krivoglaz? • Bri
Page 13: Single crystals and surfaces -trunc
Page 17 and 18: X-rays scattering measurements infe
Page 19 and 20: Extra diffuse scattering often obse
Page 21 and 22: Complete transformation induced by
Page 23 and 24: Neutrons uniquely sensitive to low
Page 25 and 26: Alloys can have another type 1 defe
Page 27 and 28: Neutron/ X-rays Complimentary For S
Page 29 and 30: X-ray anomalous scattering can chan
Page 31 and 32: Measurement and theory of atomic si
Page 33 and 34: High-energy x-ray measurements revo
Page 35 and 36: Dislocations -Krivoglaz defect of t
Page 37 and 38: Intense microbeams/area detectors p
Page 39 and 40: Diffuse microdiffraction holds prom
Page 41 and 42: Numerical calculations determine qu
Page 43 and 44: X-ray Diffuse Scattering Huang theo
Page 45 and 46: Corelli SNS beamline specialized fo
Page 47 and 48: New directions in diffuse scatterin
Page 49 and 50: A. Gunier Diffuse scattering done b

Diffuse Scattering - Spallation Neutron Source - Oak Ridge National ...

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