Improved algorithm on contour line position relation

2011 ◽  
Vol 31 (5) ◽  
pp. 1193-1197
Author(s):  
Huai-qing HE ◽  
Peng YANG
2009 ◽  
Vol 19 (6) ◽  
pp. 942-948 ◽  
Author(s):  
Michele Iester ◽  
Valeria Mariotti ◽  
Francesco Lanza ◽  
Giovanni Calabria

Author(s):  
J. M. Zuo ◽  
A. L. Weickenmeier ◽  
R. Holmestad ◽  
J. C. H. Spence

The application of high order reflections in a weak diffraction condition off the zone axis center, including those in high order laue zones (HOLZ), holds great promise for structure determination using convergent beam electron diffraction (CBED). It is believed that in this case the intensities of high order reflections are kinematic or two-beam like. Hence, the measured intensity can be related to the structure factor amplitude. Then the standard procedure of structure determination in crystallography may be used for solving unknown structures. The dynamic effect on HOLZ line position and intensity in a strongly diffracting zone axis is well known. In a weak diffraction condition, the HOLZ line position may be approximated by the kinematic position, however, it is not clear whether this is also true for HOLZ intensities. The HOLZ lines, as they appear in CBED patterns, do show strong intensity variations along the line especially near the crossing of two lines, rather than constant intensity along the Bragg condition as predicted by kinematic or two beam theory.


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