On the Excitation of Double Giant Resonances in Heavy Ion Reactions

Details On the Excitation of Double Giant Resonances in Heavy Ion Reactions On the Excitation of Double Giant Resonances in Heavy Ion Reactions

2003-04-28

arxiv.org/abs/nucl-th/0304081v1

Nucl.Phys. A724 (2003) 85-98

Physics

Nuclear Physics

Nuclear Theory

Accepten in Nuclear Physics A. 10 eps figures and source file in an uncompressed tar package

Scientific paper

10.1016/S0375-9474(03)01479-9

The interplay of nuclear and Coulomb processes in the inelastic excitation of single- and double-phonon giant resonances in heavy ion collisions is studied within a simple reaction model. Predominance of the Coulomb excitation mechanism on the population of the single-phonon and, on the contrary, predominance of the nuclear excitation for the double-phonon is evidenced. The effect of the spreading of the strength distribution of the giant resonances on the excitation process is analyzed, showing sizeable modifications in the case of Coulomb dominated processes.

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