Comment on “Nature of Quantum Localization in Atomic Momentum Transfer Experiments”

1997 ◽  
Vol 78 (6) ◽  
pp. 1195-1195 ◽  
Author(s):  
S. Meneghini ◽  
P. J. Bardroff ◽  
E. Mayr ◽  
W. P. Schleich
Keyword(s):  
Momentum Transfer ◽  
Atomic Momentum ◽  
Quantum Localization

Comment on “Nature of Quantum Localization in Atomic Momentum Transfer Experiments”

1997 ◽  
Vol 78 (6) ◽  
pp. 1194-1194 ◽  
Author(s):  
M. G. Raizen ◽  
Bala Sundaram ◽  
Qian Niu
Keyword(s):  
Momentum Transfer ◽  
Atomic Momentum ◽  
Quantum Localization

Observation of Dynamical Localization in Atomic Momentum Transfer: A New Testing Ground for Quantum Chaos

1994 ◽  
Vol 73 (22) ◽  
pp. 2974-2977 ◽  
Author(s):  
F. L. Moore ◽  
J. C. Robinson ◽  
C. Bharucha ◽  
P. E. Williams ◽  
M. G. Raizen
Keyword(s):  
Momentum Transfer ◽  
Quantum Chaos ◽  
Dynamical Localization ◽  
Testing Ground ◽  
Atomic 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.

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
Sign in / Sign up

Export Citation Format

Share Document