The (γ,pd) reaction in 12C

S. J. McAllister, J. C. McGeorge, I. J. D. MacGregor, J. R. M. Annand, S. J. Hall, P. D. Harty, J. D. Kellie, G. J. Miller, R. O. Owens, D. P. Watts, T. T-H. Yau, D. Branford, J. A. MacKenzie, M. Liang, P. Grabmayr, T. Hehl, T. Lamparter, M. Sauer, R. Schneider, J. Ahrens, and R. Beck
Phys. Rev. C 60, 044610 – Published 8 September 1999
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Abstract

The 12C(γ,pd) reaction has been studied for photon energies between 150 and 400 MeV using the Glasgow photon tagging spectrometer and plastic scintillator detectors at the Mainz MAMI electron accelerator. The overall energy resolution was 6 MeV, sufficient to determine the initial shells of the emitted nucleons. The energy dependence of the cross section and the missing energy and recoil momentum spectra indicate that, for low residual excitation, the reaction proceeds through interaction with the three detected nucleons in a similar manner to the 3He(γ,pd) reaction while the rest of the nucleus acts as a spectator.

  • Received 5 May 1999

DOI:https://doi.org/10.1103/PhysRevC.60.044610

©1999 American Physical Society

Authors & Affiliations

S. J. McAllister*, J. C. McGeorge, I. J. D. MacGregor, J. R. M. Annand, S. J. Hall, P. D. Harty, J. D. Kellie, G. J. Miller, R. O. Owens, D. P. Watts, and T. T-H. Yau§

  • Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland

D. Branford, J. A. MacKenzie, and M. Liang

  • Department of Physics, University of Edinburgh, Edinburgh EH9 3JZ, Scotland

P. Grabmayr, T. Hehl, T. Lamparter**, M. Sauer††, and R. Schneider††

  • Physikalisches Institut, Universität Tübingen, D-72076 Tübingen, Germany

J. Ahrens and R. Beck

  • Institut für Kernphysik, Johannes-Gutenberg Universität, D-6500 Mainz, Germany

  • *Present address: J. P. Morgan Ltd, London, UK.
  • Present address: School of Physics, University of Melbourne, Australia.
  • Present address: Daniel (Europe) Ltd., Larbert, UK.
  • §Present address: Chase Research, Basingstoke, UK.
  • Present address: Amadeus Data Processing, Munich, Germany.
  • Present address: Thomas Jefferson Lab, Newport News, VA 23606.
  • **Present address: Nova Data, Karlsruhe, Germany.
  • ††Present address: ZDV, Universität Tübingen, Germany.

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Vol. 60, Iss. 4 — October 1999

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