Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 168, Issue 3, Pages 329-336Publisher
ELSEVIER
DOI: 10.1016/S0168-583X(99)01101-5
Keywords
double photon Compton scattering; collision differential cross-section; energy spectra; coincidence measurements; detector efficiencies
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The collision differential cross-section and energy of one of the final photons for double photon Compton scattering have been measured as a function of scattering angle theta(1). The incident photon energy is 0.662 MeV and thin aluminium foils are used as a scatterer. The two simultaneously emitted photons in this higher order process are detected in coincidence using two NaI(T1) scintillation spectrometers and 30 ns timing electronics. The measured values for energy and collision differential cross-section agree with theory within experimental estimated error. The present data provide information of angular dependence in this higher order process. (C) 2000 Elsevier Science B.V. All rights reserved.
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