Analytical approach to electromagnetic processes in loosely bound nuclei : application to 8
نویسندگان
چکیده
In this paper we develop an analytical model in order to study electromagnetic processes involving loosely bound neutron–rich and proton–rich nuclei. We construct a model wave function, to describe loosely bound few–body systems, having the correct behaviour both at large and small distances. The continuum states are approximated by regular Coulomb functions. As a test case we consider the two– body Coulomb dissociation of 8 B and, the inverse, radiative capture reaction. The difference between using a pure two–body model and the results obtained when incorporating many–body effects, is investigated. We conclude that the interpretation of experimental data is highly model dependent and stress the importance of measuring few–body channels. Electromagnetic processes such as radiative capture, photo–dissociation and Coulomb dissociation have always been, and still remain, an excellent tool to investigate nuclear structure. Unfortunately, for radioactive nuclei the radia-tive capture experiments are very difficult and studies of photo–dissociation are virtually impossible. However, with the advent of radioactive beam facilities , nuclear structure of dripline nuclei can be studied using Coulomb dissoci-ation on heavy targets. The Coulomb breakup of these nuclei is of interest also in nuclear astrophysics, since it can be related to the corresponding radiative capture process at astrophysical energies [1]. In this paper, we will present an analytical model for Coulomb dissociation (and consequently for radiative
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Se p 20 02 Analytical approach to electromagnetic processes in loosely bound nuclei : application to 8
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