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[求助] 关于材料表真的一些问题,求大侠解救啊

1.  What are the lateral resolution for AFM,STM and SEM and HRTEM?
2.  Please  give  a  brief  explanation  of  the  following  terms:  spherical  aberration,  chromatic  aberration  and
astigmatism.  
4.    For  electron  diffraction pattern  in  fig.1, if  we  index r1 as    (212),r2 as    (1-1 1),please index  r3,and calculate electron beam incident direction: <uvw>.
5. Draw a simple Ewald sphere/ZOLZ diagram for the Bragg (s=0) two beam orientation. Define k0, k, and g, and show analytically that this construction is equivalent to the Bragg law for diffraction.
7. Present drawings of the zero and first levels of the reciprocal lattice for a pri mitive cubic real lattice looking
down the c axis. Show and index a few lattice points in all four quadrants. Show the unit cell for the reciprocal
lattice.
8. Calculate the structure factor, Fhkl, for a base-centered unit cell as shown in fig.2, which has two atoms of the same kind and located at 000 and ½½0.关于材料表真的一些问题,求大侠解救啊
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