Coherent Backscattering from Multiple Scattering Systems - KOPS ...
Coherent Backscattering from Multiple Scattering Systems - KOPS ...
Coherent Backscattering from Multiple Scattering Systems - KOPS ...
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5 Experiments<br />
1<br />
0.8<br />
α c<br />
(A)<br />
α c<br />
(A) + αc<br />
(B+C)<br />
R700 with ℵ=1<br />
R700 with ℵ=0.92<br />
cooperon<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
0 10 20 30 40 50 60 70 80 90<br />
scattering angle [deg]<br />
1<br />
0.8<br />
α c<br />
(A)<br />
α c<br />
(A) + αc<br />
(B+C)<br />
NIX−2 with ℵ=1<br />
NIX−2 with ℵ=0.93<br />
cooperon<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
0 10 20 30 40 50 60 70 80 90<br />
scattering angle [deg]<br />
Figure 5.7: Example wide angle backscattering data. Top: R700, bottom: NIX-2. If the<br />
different albedos of sample and reference are neglected (red), the data clearly violate<br />
conservation of energy and do not fit with any theory. The correctly evaluated data<br />
(orange) deviate significantly <strong>from</strong> α (A)<br />
c , but fit very well with α c = α (A)<br />
c + α (B+C)<br />
c within<br />
the region of confidence (which is only marginally larger than the data points and is<br />
therefore not drawn explicitly). For R700 one obtains kl ∗ = 2.7(3) and l ∗ = 250(30) nm,<br />
and kl ∗ = 6.4(3) and l ∗ = 600(30) nm for NIX-2. The integration over the cooperon<br />
yields E = −0.024(5) sterad for R700 and E = −0.013(7) sterad for NIX-2 if the error of<br />
the albedo is set to zero. E is zero within the margins of error if the error of the albedo<br />
is 1%.<br />
54