Reaction (dpol,2He) at intermediate energies

C. Ellegaard, C. Gaarde, T. S. Jorgensen, J. S. Larsen, C. Goodman, I. Bergqvist, A. Brockstedt, P. Ekström, M. Bedjidian, D. Contardo, J. Y. Grossiord, A. Guichard, D. Bachelier, J. L. Boyard, T. Hennino, J. C. Jourdain, M. Roy-Stephan, P. Radvanyi, and J. Tinsley
Phys. Rev. Lett. 59, 974 – Published 31 August 1987
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Abstract

We have succeeded in measuring at 0° and small angles the energy spectra for the (d,2p[1S0]) reaction (with the two protons in the singlet S state) at 650 MeV and 2 GeV. It is demonstrated that the reaction is a one-step process that can be used to study isospin-spin excitations. The Δ excitation is very clearly observed. A shift down in energy of the Δ peak from the proton to the C12 target is observed. The experiments are performed with a tensor polarized beam and the tensor analyzing power for the p(dpol,2He)n reaction at 2 GeV is given.

  • Received 1 July 1987

DOI:https://doi.org/10.1103/PhysRevLett.59.974

©1987 American Physical Society

Authors & Affiliations

C. Ellegaard, C. Gaarde, T. S. Jorgensen, and J. S. Larsen

  • Niels Bohr Institute, DK-2100 Copenhagen, Denmark

C. Goodman

  • Indiana University, Bloomington, Indiana 47405

I. Bergqvist, A. Brockstedt, and P. Ekström

  • University of Lund, S-22362 Lund, Sweden

M. Bedjidian, D. Contardo, J. Y. Grossiord, and A. Guichard

  • IPN, Université Lyon, F-69622 Villeurbanne Cedex, France

D. Bachelier, J. L. Boyard, T. Hennino, J. C. Jourdain, and M. Roy-Stephan

  • Institut de Physique Nucléaire, Université de Paris-Sud, Orsay, F-91406 Orsay Cedex, France

P. Radvanyi and J. Tinsley

  • Laboratoire National Saturne, F-91191 Gif-sur-Yvette, France

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Vol. 59, Iss. 9 — 31 August 1987

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