Diffuse Scattering - Spallation Neutron Source - Oak Ridge National ...
Diffuse Scattering - Spallation Neutron Source - Oak Ridge National ...
Diffuse Scattering - Spallation Neutron Source - Oak Ridge National ...
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<strong>Neutron</strong>s can select isotope to eliminate Bragg<br />
scattering<br />
• Total scattering c af a 2 + cbf b 2<br />
= 3<br />
• Bragg scattering (c af a+<br />
c bf b) 2 = 0<br />
• Laue (diffuse) scattering<br />
c ac b(f a -f b) 2 =3<br />
+1 +1<br />
- 3<br />
+1 +1<br />
Isotopic purity important as different isotopes have distinct<br />
scattering cross sections- only one experiment ever done!<br />
+1<br />
+1<br />
+1 +1<br />
- 3<br />
+1 +1<br />
-3 0 0<br />
0<br />
0 0<br />
+1<br />
0<br />
+1<br />
-3<br />
0<br />
0
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