Relativistic corrections in (γ,N) knockout reactions

A. Meucci, C. Giusti, and F. D. Pacati
Phys. Rev. C 64, 064615 – Published 21 November 2001
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Abstract

We develop a fully relativistic distorted wave impulse approximation (DWIA) model for photonuclear reactions using the relativistic mean field theory for the bound state, and the Pauli reduction of the scattering state, which is calculated from a relativistic optical potential. Results for the 12C(γ,p) and 16O(γ,p) differential cross sections and photon asymmetries are displayed in a photon energy range between 60 and 257 MeV, and compared with nonrelativistic DWIA calculations. The effects of the spinor distortion and of the effective momentum approximation for the scattering state are discussed. The sensitivity of the model to different prescriptions for the one-body current operator is investigated. The off-shell ambiguities are large in (γ,p) calculations, and even larger in (γ,n) knockout.

  • Received 18 July 2001

DOI:https://doi.org/10.1103/PhysRevC.64.064615

©2001 American Physical Society

Authors & Affiliations

A. Meucci, C. Giusti, and F. D. Pacati

  • Dipartimento di Fisica Nucleare e Teorica, Università di Pavia and Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, Italy

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Issue

Vol. 64, Iss. 6 — December 2001

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