Center-of-mass effects in electromagnetic two-proton knockout reactions
نویسندگان
چکیده
منابع مشابه
Two - nucleon correlation effects in knockout reactions from 12 C
Reactions that involve the direct and sudden removal of a pair of like or unlike nucleons from a fast projectile beam by a light target nucleus are considered. Specifically, we study the three two-nucleon removal channels from 12C that populate final states in the 10Be, 10B, and 10C reaction residues. The calculated two-nucleon removal cross sections and the residue momentum distributions are c...
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Recent advances in the description of electromagnetic two-nucleon knockout reactions are reviewed. The sensitivity to different types of correlations and to their treatment in the nuclear wave functions, the effects of final-state interactions and the role of center-of-mass effects in connection with the problem of the lack of orthogonality between initial bound states and final scattering stat...
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The contribution of the ∆(1232) isobar to the electromagnetic current of the two-nucleon system and its role in (γ,NN) processes is investigated. The difference between the genuine ∆-excitation current and that part of the current connected to the deexcitation of a preformed ∆ in the target nucleus is stressed. The latter cannot lead to a resonant behaviour of matrix elements for energies in th...
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Within the framework of the relativistic distorted wave impulse approximation (DWIA), we investigate the sensitivity of complete sets of polarization transfer observables (P, Ay, Dnn, Ds′s, Dl′l, Ds′l, and Dl′s), for exclusive proton knockout from the 3s1/2, 2d3/2 and 2d5/2 states in 208Pb, at an incident laboratory kinetic energy of 202 MeV, and for coincident coplanar scattering angles (28.0,...
متن کاملTwo-proton knockout on neutron-rich nuclei
Two-proton knockout reactions on neutron-rich nuclei [1] have been studied in inverse kinematics at intermediate energy. Strong evidence that the two-proton removal from a neutron-rich system proceeds as a direct reaction is presented, together with a preliminary theoretical discussion of the partial cross sections based on eikonal reaction theory and the many-body shell model. They show that t...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2007
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2007-10001-y