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The European Physical Journal A

, Volume 31, Issue 2, pp 155–162 | Cite as

Center-of-mass effects in electromagnetic two-proton knockout reactions

  • C. GiustiEmail author
  • F. D. Pacati
  • M. Schwamb
  • S. Boffi
Regular Article - Nuclear Structure and Reactions

Abstract.

The role of center-of mass (CM) effects in the one-body nuclear current in the description of electromagnetically induced two-nucleon knockout reactions is discussed in connection with the problem of the lack of orthogonality between initial bound states and final scattering states obtained by the use of an energy-dependent optical model potential. Results for the cross-sections of the exclusive 16O(e, e'pp)14C and 16O(γ, pp)14C knockout reactions in different kinematics are presented and discussed. In super-parallel kinematics CM effects produce a strong enhancement of the 16O(e, e'pp)14Cg.s. cross-section which strongly reduces the destructive interference between the one-body and Δ-current and the sensitivity to the treatment of the Δ-current found in previous work.

PACS.

21.60.-n Nuclear structure models and methods 25.20.Lj Photoproduction reactions 25.30.Fj Inelastic electron scattering to continuum 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • C. Giusti
    • 1
    Email author
  • F. D. Pacati
    • 1
  • M. Schwamb
    • 2
    • 3
  • S. Boffi
    • 1
  1. 1.Dipartimento di Fisica Nucleare e TeoricaUniversità degli Studi di Pavia and Istituto Nazionale di Fisica Nucleare, Sezione di PaviaPaviaItaly
  2. 2.Dipartimento di FisicaUniversità degli Studi di Trento and Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di TrentoPovo (Trento)Italy
  3. 3.European Center for Theoretical Studies in Nuclear Physics and Related AreasVillazzano (Trento)Italy

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