E1 and E2 giant resonances in 22O |
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| Affiliation: | 1. Kyorin University School of Medicine, Shinkawa, Mitaka, Tokyo 181, Japan;2. Cyclotron Laboratory, RIKEN, Hirosawa, Wako, Saitama 351-01, Japan;1. School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa;2. iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa;3. Department of Physics and Astronomy, Texas A&M University-Commerce, Commerce, TX 75429, USA;4. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia;5. Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany;6. Institut für Theoretische Physik II, Universität Erlangen, D-91058 Erlangen, Germany;7. Department of Physics, University of Stellenbosch, Matieland 7602, South Africa;8. School of Geosciences, University of the Witwatersrand, Johannesburg 2050, South Africa;9. Department of Physics, University of Cape Town, Rondebosch 7700, South Africa;10. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan;11. Institute of Particle and Nuclear Physics, Charles University, CZ-18000, Prague 8, Czech Republic |
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| Abstract: | To understand the response of very neutron rich nuclei to external fields, I study the E1 and E2 giant resonances in 22O using the time-dependent density-matrix theory (TDDM). TDDM is an extension of the time-dependent Hartree-Fock theory to include two-body correlations and gives us a framework to study both the energies and widths of the giant resonances. It is found that the E1 and E2 strength distributions quite differ from those in stable nuclei due to the existence of excess neutrons. |
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