Single-neutron removal reactions from 15C and 11Be: Deviations from the eikonal approximation

J. A. Tostevin, D. Bazin, B. A. Brown, T. Glasmacher, P. G. Hansen, V. Maddalena, A. Navin, and B. M. Sherrill
Phys. Rev. C 66, 024607 – Published 23 August 2002
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Abstract

The momentum distributions of the residual nuclei after one-neutron removal have been measured in coincidence with gamma rays identifying the distributions associated with the excited and ground state levels of these residues. These differential partial cross sections map the momentum content of the removed-nucleon wave functions and their description provides an exacting test of the reaction dynamics. Momentum distribution data when populating the 14C and 10Be ground states show a low-high momentum asymmetry that is incompatible with the hitherto used eikonal descriptions. A fully dynamical coupled discretized continuum channels description of the elastic breakup mechanism is shown to provide an understanding of this new observation which is most pronounced for weakly bound, s-wave, nuclear halo states. This interpretation is clarified further by an analysis of the momentum distributions as a function of the angle of detection of the heavy ground state residues.

  • Received 24 April 2002

DOI:https://doi.org/10.1103/PhysRevC.66.024607

©2002 American Physical Society

Authors & Affiliations

J. A. Tostevin1, D. Bazin2, B. A. Brown2,3, T. Glasmacher2,3, P. G. Hansen2,3, V. Maddalena2,3, A. Navin2,*, and B. M. Sherrill2,3

  • 1Department of Physics, School of Physics and Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
  • 2National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
  • 3Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824

  • *Permanent address: Nuclear Physics Division, BARC, Trombay, Mumbai 400 085, India.

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Vol. 66, Iss. 2 — August 2002

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