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Physics Letters A

Compton scattering of photons from standing wave fields in the Bragg case of X-ray diffraction

Winfried Schülke

Published Jun 1, 1981• 29 citations
Publisher
DOI
10.1016/0375-9601(81)90478-3

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Slow atoms from a magneto-optical trap are used to study diffraction from a near-resonant standing-wave light field. Long interaction times make it possible to observe unidirectional Bragg scattering. In particular, the Pendellösung interference effect between two resonant momentum states is demonstrated for first- and second-order diffraction. The oscillation frequency of second-order scattering shows a transition from a four-photon–type process at low light intensity to a two-photon–type process at higher intensity. The data are in quantitative agreement with a theoretical description which takes into account lowest-energy momentum states.