https://doi.org/10.1140/epja/i2007-10001-y
Regular Article - Nuclear Structure and Reactions
Center-of-mass effects in electromagnetic two-proton knockout reactions
1
Dipartimento di Fisica Nucleare e Teorica, Università degli Studi di Pavia and Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, I-27100, Pavia, Italy
2
Dipartimento di Fisica, Università degli Studi di Trento and Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Trento, I-38100, Povo (Trento), Italy
3
European Center for Theoretical Studies in Nuclear Physics and Related Areas, I-38100, Villazzano (Trento), Italy
* e-mail: Carlotta.Giusti@pv-infn.it
Received:
18
January
2007
Accepted:
19
January
2007
Published online:
8
February
2007
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 –
© Società Italiana di Fisica and Springer-Verlag, 2007