Rescattering effects for the C12(p,2p)B11 reaction at 400 MeV/u

R. Crespo, A. Deltuva, and E. Cravo
Phys. Rev. C 90, 044606 – Published 14 October 2014

Abstract

Background: Single-particle occupancies for a wide range of magic and near-magic nuclei are significantly below the values predicted by independent-particle shell-model calculations.

Purpose: We aim in this paper to address the question: To what extent does the extracted structure information have uncertainties due to approximations involved in the reaction formalism and assumed dynamic model?

Method: The proton knockout reaction C12(p,2p)11B at 400 MeV/u incident energy is analyzed using the few-body Faddeev–Alt-Grassberger-Sandhas reaction framework. A two-body model is used for C12 which involves an inert B11(32) core and a valence proton. The contributions of higher order terms beyond the single scattering approximation are studied, in particular the ones corresponding to the rescattering between C12 constituents.

Results: Total cross section and core transverse momentum distribution are calculated. We have found that rescattering terms between the composite nucleus constituents contribute dominantly to the absorptive distortion.

Conclusions: The accurate treatment of these rescattering terms in the reaction formalism is crucial if one aims to extract reliable structure information from the data. We have also found that work needs to be performed in the reaction theory in order to incorporate a complete structure description of the projectile nucleus and to bridge the proton knockout results with those obtained from electron scattering.

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  • Received 24 June 2014

DOI:https://doi.org/10.1103/PhysRevC.90.044606

©2014 American Physical Society

Authors & Affiliations

R. Crespo1,2,*, A. Deltuva3,4,†, and E. Cravo3,5,‡

  • 1Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Av. Prof. Cavaco Silva, Taguspark, 2780-990 Porto Salvo, Oeiras, Portugal
  • 2Centro de Ciências e Tecnologias Nucleares, Universidade de Lisboa, 2686-953 Sacavém, Portugal
  • 3Centro de Física Nuclear da Universidade de Lisboa, Av. Prof. Gama Pinto 2, 1649-003 Lisboa, Portugal
  • 4Institute of Theoretical Physics and Astronomy, Vilnius University, A. Goštauto 12, LT-01108 Vilnius, Lithuania
  • 5Departamento de Física, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Edifício C8, 1749-016 Lisboa, Portugal

  • *raquel.crespo@tecnico.ulisboa.pt
  • deltuva@cii.fc.ul.pt
  • edgar@cii.fc.ul.pt

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Issue

Vol. 90, Iss. 4 — October 2014

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