Small Angle Scattering of neutrons and xrays - NeutronXraySchool ...

More documents

Recommendations

Info

$Powder Diffraction - Spallation Neutron Source$

$Single Crystal Diffraction - Spallation Neutron Source$

SANS vs. Synchrotron SAXS • SAXS & SANS – nm scale structural analysis (~1nm-1μm) – Non-destructive Non destructive – In-situ • Synchrotron X-rays – High throughput – Time-resolution (ms – ps) – Tiny beams – microfocus: e.g. scanning of cells • Neutrons – ‘see’ light atoms: polymers, biology, soft condensed matter, hydrogen in metals – Isotope labeling – High penetration • bulky specimens, e.g. residual stress in motor block • complicated environments (P,T), e.g. 4He cryostat – Magnetic contrast 6 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name
Neutron Scattering and Microscopy • Common features – Size range g 1nm-1μm μ – Contrast labeling options (stains / isotope labels) • SAS practical aspects – N No special i l sample l preparation ti such h as cryo-microtome i t – Sample environments control (p, T, H) – Non-destructive (exception: radiation damage in synchrotron beam) – In-situ, time-resolved • Fundamental difference – “Real Real space space” image with certain resolution – Scattering pattern, averaged over volume • Complimentarity 7 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name
Page 1 and 2: Small Angle Scattering of neutrons
Page 3 and 4: Outline • Applications - is SAS f
Page 5: SAS applications A to Z But what Al
Page 9 and 10: Microscopy : enlarged image inciden
Page 11 and 12: Diffraction (Crystallography) here
Page 13 and 14: Scattering Vector - q aka momentum
Page 15 and 16: Absolute Intensity / Scattering Cro
Page 17 and 18: 14 -3 scattering lenngth cm.Å dens
Page 19 and 20: SANS of labeled stretched rubber
Page 21 and 22: At the beamline incident beam Sampl
Page 23 and 24: SANS Instrument - a pinhole camera?
Page 25 and 26: SANS at a pulsed source EQ-SANS, SN
Page 27 and 28: SANS guide hall (HFIR) 27 Managed b
Page 29 and 30: 29 Managed by UT-Battelle for the U
Page 31 and 32: Data Reduction, Processing, Correct
Page 33 and 34: Analysis of SAS data here typical p
Page 35 and 36: Analysis of SAS data S(q) * P(q) is
Page 37 and 38: Sphere precisely: monodisperse sphe
Page 39 and 40: P(Q) P Sphere precisely: monodisper
Page 41 and 42: Spheres of different sizes P(Q) 10
Page 43 and 44: Ellipsoid aspect ratio 1.5 P(Q) 10
Page 45 and 46: “Long & thin” cylinder P(Q) P 1
Page 47 and 48: Polymer coil P(Q) 1 8 6 0.1 4 2 8 6
Page 49 and 50: Guinier Analysis size of any kind o
Page 51 and 52: Modified Guinier Analysis for objec
Page 53 and 54: P( 4 3 2 (r) 4 1 Pair correlation f
Page 55 and 56: SAS Form Factor Modeling of great g
Page 57 and 58:
Two-Component Systems 57 Managed by
Page 59 and 60:
Interparticle Structure Factor S(Q)
Page 61 and 62:
S(Q) and Statistical Thermodynamics
Page 63 and 64:
Structural Hierarchy (particulate)
Page 65:
SAS Summary • SAS applications ar
show all

Small Angle Scattering of neutrons and xrays - NeutronXraySchool ...

Create successful ePaper yourself

Delete template?

Save as template?