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Microscopic description of multiphonon states excitation in heavy ion collisions

✍ Scribed by E.G. Lanza; M.V. Andrés; F. Catara; Ph. Chomaz; C. Volpe

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
267 KB
Volume
654
Category
Article
ISSN
0375-9474

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✦ Synopsis

Starting from a microscopic approach based on RPA, we go beyond it by introducing anharmonicity by taking into account the mixing of two-phonon states among themselves and with one-phonon states. By introducing also non linear terms in the external field we show that these new ingredients give an explanation of the puzzle of the excitation cross section of the double giant dipole resonance (DGDR) for the 2°Spb + 2°Spb system at 641 MeV/A.

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✍ E Zabrodin; L Bravina; C Fuchs; A Faessler 📂 Article 📅 2004 🏛 Elsevier Science 🌐 English ⚖ 282 KB

Anisotropic flow of hadrons is studied in heavy ion collisions at SPS and RHIC energies within the microscopic quark-gluon string model. The model was found to reproduce correctly many of the flow features, e.g., the wiggle structure of direct flow of nucleons at midrapidity, or centrality, rapidity