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Basics and applications of low-loss EELS

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Interb<strong>and</strong> transitions<br />

counts x 10^4<br />

Dark-field techniques<br />

200<br />

GaN<br />

180<br />

160<br />

BF<br />

12 mrad<br />

140<br />

120<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

-0 5 10 15 20 25 30 35<br />

eV<br />

0 5 10 15 20 25 30 35<br />

Energy <strong>loss</strong> (eV)<br />

Spectra demonstrate validity <strong>of</strong> the DF<br />

collection. Main spectroscopic features<br />

remain intact even if a large transverse<br />

momentum transfer is involved.<br />

36<br />

Gu et al., Ultramicroscopy 109 (2009) 1164<br />

MPI for Intelligent Systems

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