Angular diffraction

2009 ◽  
Author(s):  
S. Franke-Arnold ◽  
B. Jack ◽  
J. Leach ◽  
M. J. Padgett
Keyword(s):  
Angular Diffraction

scholarly journals IMAGE RECONSTRUCTION FROM HIGHLY SPARSE AND LIMITED ANGULAR DIFFRACTION TOMOGRAPHY USING COMPRESSED SENSING APPROACH

2017 ◽  
Vol 158 ◽  
pp. 21-36 ◽  
Author(s):  
Pavel Roy Paladhi ◽  
Amin Tayebi ◽  
Portia Banerjee ◽  
Lalita Udpa ◽  
Satish Udpa
Keyword(s):  
Image Reconstruction ◽  
Compressed Sensing ◽  
Diffraction Tomography ◽  
Angular Diffraction

Negative Ion Resonance Evidenced by Vibrationally Resolved Electron Diffraction On the H/Si(111) Surface

1998 ◽  
Vol 05 (01) ◽  
pp. 63-67
Author(s):  
Y. He ◽  
L.-M. Yu ◽  
P. A. Thiry ◽  
R. Caudano
Keyword(s):  
Electron Diffraction ◽  
Resonant Scattering ◽  
Negative Ion ◽  
Resonance Mechanism ◽  
Resolution Electron ◽  
Surface Resonance ◽  
Surface Vibrations ◽  
Diffraction Patterns ◽  
Angular Diffraction ◽  
Electron Energy Loss

The surface vibrations of H-terminated Si(111) are investigated by high resolution electron energy loss spectroscopy (HREELS). Clear evidence is obtained for reassigning the electron resonant scattering from a surface resonance to a negative ion resonance mechanism. Since the electrons emitted from the trapping states show characteristic angular diffraction patterns realated with the geometric and vibrational symmetries of the surface, we suggest the possibility of using this system to investigate vibrationally resolved electron diffraction processes.

Unusual Moiré superlattices in exfoliated μm-thin HOPG lamellae: An angular-diffraction study

2020 ◽  
Vol 108 ◽  
pp. 107920 ◽  
Author(s):  
Filippo S. Boi ◽  
Gao Shuai ◽  
Jiqiu Wen ◽  
Shanling Wang
Keyword(s):  
Diffraction Study ◽  
Angular Diffraction

Structural effects in single-crystal photoelectron, Auger-electron, and Kikuchi-electron angular diffraction patterns

1991 ◽  
Vol 258 (1-3) ◽  
pp. A602
Author(s):  
Z.-L. Han ◽  
S. Hardcastle ◽  
G.R. Harp ◽  
H. Li ◽  
X.-D. Wang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Auger Electron ◽  
Structural Effects ◽  
Diffraction Patterns ◽  
Angular Diffraction

Structural effects in single-crystal photoelectron, Auger-electron, and Kikuchi-electron angular diffraction patterns

1991 ◽  
Vol 258 (1-3) ◽  
pp. 313-327 ◽  
Author(s):  
Z.-L. Han ◽  
S. Hardcastle ◽  
G.R. Harp ◽  
H. Li ◽  
X.-D. Wang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Auger Electron ◽  
Structural Effects ◽  
Diffraction Patterns ◽  
Angular Diffraction

scholarly journals Path length dependent neutron diffraction peak shifts observed during residual strain measurements in U–8 wt% Mo castings

2017 ◽  
Vol 50 (3) ◽  
pp. 851-858 ◽  
Author(s):  
M. A. Steiner ◽  
J. R. Bunn ◽  
J. R. Einhorn ◽  
E. Garlea ◽  
E. A. Payzant ◽  
...  
Keyword(s):  
Residual Stress ◽  
Path Length ◽  
Peak Shift ◽  
Diffraction Peak ◽  
Strain Measurements ◽  
Residual Stress State ◽  
Significant Attenuation ◽  
Path Lengths ◽  
Neutron Monochromator ◽  
Angular Diffraction

This study reports an angular diffraction peak shift that scales linearly with the neutron beam path length traveled through a diffracting sample. This shift was observed in the context of mapping the residual stress state of a large U–8 wt% Mo casting, as well as during complementary measurements on a smaller casting of the same material. If uncorrected, this peak shift implies a non-physical level of residual stress. A hypothesis for the origin of this shift is presented, based upon non-ideal focusing of the neutron monochromator in combination with changes to the wavelength distribution reaching the detector due to factors such as attenuation. The magnitude of the shift is observed to vary linearly with the width of the diffraction peak reaching the detector. Consideration of this shift will be important for strain measurements requiring long path lengths through samples with significant attenuation. This effect can probably be reduced by selecting smaller voxel slit widths.

scholarly journals Angular diffraction

2008 ◽  
Vol 10 (10) ◽  
pp. 103013 ◽  
Author(s):  
B Jack ◽  
M J Padgett ◽  
S Franke-Arnold
Keyword(s):  
Angular Diffraction

scholarly journals Experimental generation of Laguerre-Gaussian beam using angular diffraction of binary phase plate

2010 ◽  
Vol 59 (6) ◽  
pp. 3930
Author(s):  
Ren Yu-Xuan ◽  
Wu Jian-Guang ◽  
Zhou Xiao-Wei ◽  
Fu Shao-Jun ◽  
Sun Qing ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Phase Plate ◽  
Binary Phase ◽  
Angular Diffraction

Angular diffraction of an optical vortex induced by the Gouy phase

2012 ◽  
Vol 14 (5) ◽  
pp. 055707 ◽  
Author(s):  
H X Cui ◽  
X L Wang ◽  
B Gu ◽  
Y N Li ◽  
J Chen ◽  
...  
Keyword(s):  
Optical Vortex ◽  
Gouy Phase ◽  
Angular Diffraction
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