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Published November 23, 1998 | Published
Journal Article Open

Measurements of Deuteron Photodisintegration up to 4.0 GeV


The first measurements of the differential cross section for the d(γ,p)n reaction up to 4.0 GeV were performed at the Continuous Electron Beam Accelerator Facility (CEBAF) at Thomas Jefferson Laboratory. We report the cross sections at the proton center-of-mass angles of 36°, 52°, 69°, and 89°. These results are in reasonable agreement with previous measurements at lower energy. The 89° and 69° data show constituent-counting-rule behavior up to 4.0 GeV photon energy. The 52° and 36° data disagree with the counting-rule behavior. The quantum chromodynamics (QCD) model of nuclear reactions involving reduced amplitudes disagrees with the present data.

Additional Information

© 1998 The American Physical Society. Received 7 August 1998; published in the issue dated 23 November 1998. We acknowledge the outstanding work of the staff of the accelerator division at the Thomas Jefferson National Accelerator Facility in delivering the high quality electron beam to 4 GeV and the Hall C technical staff for constructing the spectrometers and the cryotarget. We thank E. Schulte for bremsstrahlung calculations. This work is supported in part by the research grants from the U.S. Department of Energy and the U.S. National Science Foundation.

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