Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1836570 | Nuclear Physics A | 2013 | 16 Pages |
Abstract
A model for the pion photoproduction on nuclei in the A(γ,ÏNN)B reaction is presented. This is an extension of our recent model for the A(γ,ÏN)B reaction. In this approach we have moved beyond the standard shell-model considering ÎN correlations in the nuclear wave functions, which are caused by the virtual transitions NNâÎNâNN in the ground state of the nucleus. The main ingredients of the model are the two- and three-particle density matrices and the transition operators γÎâNÏ and γNâNÏ. The direct and exchange reaction mechanisms, which follow from the structure of the density matrices, are examined. The model is used to investigate the 12C(γ,Ï+p) and 12C(γ,Ïâp) reactions in the kinematic region of the large momentum transfers to the residual nuclear system, where the pion production occurs with the emission of two nucleons. Signatures of the ÎN correlations in the exclusive cross-sections of the 12C(γ,Ï+pn)10Be reaction are considered.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
I.V. Glavanakov, A.N. Tabachenko,