Center-of-mass effects on the quasihole spectroscopic factors in the 16O(e,ep) reaction

Phys. Rev. C 57, 2308 – Published 1 May 1998
D. Van Neck, M. Waroquier, A. E. L. Dieperink, Steven C. Pieper, and V. R. Pandharipande


The spectroscopic factors for the low-lying quasihole states observed in the 16O(e,ep)15N reaction are reinvestigated with a variational Monte Carlo calculation for the structure of the initial and final nucleus. A computational error in a previous report is rectified. It is shown that a proper treatment of center-of-mass motion does not lead to a reduction of the spectroscopic factor for p-shell quasihole states, but rather to a 7% enhancement. This is in agreement with analytical results obtained in the harmonic oscillator model. The center-of-mass effect worsens the discrepancy between present theoretical models and the experimentally observed single-particle strength. We discuss the present status of this problem, including some other mechanisms that may be relevant in this respect.


  • Received 8 December 1997
  • Published in the issue dated May 1998

© 1998 The American Physical Society

Authors & Affiliations

D. Van Neck and M. Waroquier

  • Department of Subatomic and Radiation Physics, University of Gent, Proeftuinstraat 86, B-9000 Gent, Belgium

A. E. L. Dieperink

  • Kernfysisch Versneller Instituut, Zernikelaan 25, 9747 AA Groningen, The Netherlands

Steven C. Pieper

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

V. R. Pandharipande

  • Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801

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