Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Background Proportional Enhancement of the Extended Fine Structure in
  Nonresonant Inelastic X-ray Scattering   We report new measurements and calculations of the non-resonant inelastic
x-ray scattering (NRIXS) from Mg and Al for a wide range of momentum transfers,
q. Extended oscillations in the dynamic structure factor S(q,w) due to
scattering from the 2p and 2s orbitals (i.e. L-edges) are observed out to more
than 150 eV past the binding energy. These results are discussed in context of
the recently proposed representation of S(q,w) for core shells as an atomic
background modulated by interference between different photoelectron scattering
paths, in analogy to the standard treatment of extended x-ray absorption fine
structure. In agreement with this representation, we find a strong increase in
the atomic background with increasing q with a concomitant enhancement in the
amplitude of the extended fine structure. This effect should be generic and
hence may enable improved measurement of the extended fine structure in a wide
range of materials containing low-Z elements.

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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ