Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray diffraction from isolated and strongly aligned gas-phase molecules
  with a free-electron laser   We report experimental results on x-ray diffraction of quantum-state-selected
and strongly aligned ensembles of the prototypical asymmetric rotor molecule
2,5-diiodobenzonitrile using the Linac Coherent Light Source. The experiments
demonstrate first steps toward a new approach to diffractive imaging of
distinct structures of individual, isolated gas-phase molecules. We confirm
several key ingredients of single molecule diffraction experiments: the
abilities to detect and count individual scattered x-ray photons in single shot
diffraction data, to deliver state-selected, e. g., structural-isomer-selected,
ensembles of molecules to the x-ray interaction volume, and to strongly align
the scattering molecules. Our approach, using ultrashort x-ray pulses, is
suitable to study ultrafast dynamics of isolated molecules.

9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
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The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ