Study of the Breakup Reaction 8B 7Be + p: Absorption Effects and E2 Strength

Phys. Rev. Lett. 77, 5020 – Published 16 December 1996
J. H. Kelley, Sam M. Austin, A. Azhari, D. Bazin, J. A. Brown, H. Esbensen, M. Fauerbach, M. Hellström, S. E. Hirzebruch, R. A. Kryger, D. J. Morrissey, R. Pfaff, C. F. Powell, E. Ramakrishnan, B. M. Sherrill, M. Steiner, T. Suomijärvi, and M. Thoennessen


Distributions of parallel and transverse momenta for 7Be fragments formed in the breakup of 8B have been measured at 41A MeV. The p distributions are narrow ( 81±4 and 62±3 MeV/c FWHM for Be and Au targets, respectively), comparable to those of neutron halo nuclei. Reaction mechanisms influence the 7Be momentum distributions, so they do not directly reflect the valence proton momentum wave function. We present reaction models that reproduce the distributions.


  • Received 9 July 1996
  • Published in the issue dated 16 December 1996

© 1996 The American Physical Society

Authors & Affiliations

J. H. Kelley1,2, Sam M. Austin1,2, A. Azhari1,2, D. Bazin1, J. A. Brown1, H. Esbensen4, M. Fauerbach1,2, M. Hellström1, S. E. Hirzebruch1, R. A. Kryger1, D. J. Morrissey1,3, R. Pfaff1,2, C. F. Powell1,3, E. Ramakrishnan1,2, B. M. Sherrill1,2, M. Steiner1,2, T. Suomijärvi1, and M. Thoennessen1,2

  • 1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
  • 2Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
  • 3Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
  • 4Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

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