Normal momentum transfer on ideal crystalline surfaces

AIAA Journal ◽  
1971 ◽  
Vol 9 (5) ◽  
pp. 965-966 ◽  
Author(s):  
R. H. NOTTER ◽  
N. F. SATHER
Keyword(s):  
Momentum Transfer ◽  
Normal Momentum ◽  
Crystalline Surfaces

Free-molecule normal-momentum transfer at satellite surfaces

AIAA Journal ◽  
1980 ◽  
Vol 18 (5) ◽  
pp. 602-605 ◽  
Author(s):  
Eldon L. Knuth
Keyword(s):  
Momentum Transfer ◽  
Free Molecule ◽  
Normal Momentum

LACBED with Quantitative Anomalous Absorption Corrections

1990 ◽  
Vol 48 (2) ◽  
pp. 528-529
Author(s):  
C.J. Rossouw ◽  
L.J. Allen ◽  
P.R. Miller
Keyword(s):  
Momentum Transfer ◽  
Scattering Amplitude ◽  
Incident Beam ◽  
Waller Factor ◽  
Beam Momentum ◽  
Anomalous Absorption ◽  
Quantitative Calculation ◽  
Ewald Sphere ◽  
Image Position ◽  
Incident Beam Energy

An Einstein model for thermal diffuse scattering (TDS) has enabled quantitative calculation of the absorptive potential V'(r). This allows anomalous absorption to be accounted for in LACBED contrast. Fourier coefficients Vg-h of the absorptive component from each atom α are calculated from integrals of the formwhere fα is the scattering amplitude and M(Q) the Debye-Waller factor. Integration over the Ewald sphere (dΩ) requires the momentum transfer q to have values up to 2ko (the incident beam momentum). Dynamical ‘dechannelling’ is accounted for by the terms g ≠ h. The crystal absorptive potential is obtained by coherently summing over these atomic absorptive potentials within the unit cell. Unlike the elastic potential, the absorptive potential is a strong function of incident beam energy Eo, since the range of momentum transfer q and associated solid angles dΩ change with the Ewald sphere radius.Fig. 1 shows a LACBED pattern of the zeroth order beam from Si aligned along a <001> zone axis.

High Resolution Low Loss Microscopy of Crystalline Surfaces

1980 ◽  
Vol 38 ◽  
pp. 162-163
Author(s):  
William Krakow ◽  
Alec N. Broers
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Surface Topography ◽  
Secondary Electron ◽  
Objective Lens ◽  
Surface Imaging ◽  
Low Loss ◽  
Fine Grained ◽  
Scanning Electron ◽  
Crystalline Surfaces

Low-loss scanning electron microscopy can be used to investigate the surface topography of solid specimens and provides enhanced image contrast over secondary electron images. A high resolution-condenser objective lens has allowed the low-loss technique to resolve separations of Au nucleii of 50Å and smaller dimensions of 25Å in samples coated with a fine grained carbon-Au-palladium layer. An estimate of the surface topography of fine grained vapor deposited materials (20 - 100Å) and the surface topography of underlying single crystal Si in the 1000 - 2000Å range has also been investigated. Surface imaging has also been performed on single crystals using diffracted electrons scattered through 10−2 rad in a conventional TEM. However, severe tilting of the specimen is required which degrades the resolution 15 to 100 fold due to image forshortening.

Crystalline Surfaces on Metals

1876 ◽  
Vol 1 (16supp) ◽  
pp. 252-252 ◽  
Keyword(s):  
Crystalline Surfaces

Medium range structure of amorphous Fe44Ni36B20-alloys by means of neutron-scattering at small momentum transfer

1992 ◽  
Vol 2 (6) ◽  
pp. 1029-1041 ◽  
Author(s):  
H. Träuble ◽  
P. Lamparter ◽  
S. Steeb
Keyword(s):  
Neutron Scattering ◽  
Momentum Transfer ◽  
Small Momentum Transfer ◽  
Small Momentum ◽  
Medium Range

MOMENTUM TRANSFER TO HELIUM-3 AND HELIUM-4-MICRODROPLETS IN HEAVY ATOM COLLISIONS

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-330-C6-331 ◽  
Author(s):  
J. Gspann ◽  
H. Vollmar
Keyword(s):  
Momentum Transfer ◽  
Heavy Atom ◽  
Helium 4 ◽  
Helium 3

INELASTIC X-RAY SCATTERING FROM COPPER K SHELL ELECTRONS AT INTERMEDIATE MOMENTUM TRANSFER

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-855-C9-858 ◽  
Author(s):  
V. MARCHETTI ◽  
C. FRANCK
Keyword(s):  
Momentum Transfer ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

HEAT AND MOMENTUM TRANSFER BY VORTEX IN MIXING LAYER

1998 ◽  
Author(s):  
A. Jazdauskas ◽  
R. Slezas ◽  
Anupras Slanciauskas ◽  
Algis Dziugys
Keyword(s):  
Momentum Transfer ◽  
Mixing Layer ◽  
Heat And Momentum Transfer

Momentum transfer at a fluid/porous interface

2002 ◽  
Author(s):  
Benoit Goyeau ◽  
Daniel Lhuillier ◽  
Dominique Gobin
Keyword(s):  
Momentum Transfer ◽  
Porous Interface
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