| Domaine : |
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Physique/Physique Nucléaire Théorique
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| Titre : |
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The isovector dipole strength in nuclei with extreme neutron excess |
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| Auteur(s) : |
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Daniel Pena Arteaga ( )1, E. Khan1, Peter Ring2 |
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| Laboratoire : |
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| Résumé : |
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The E1 strength is systematically analyzed in very neutron-rich Sn nuclei, beyond $^{132}$Sn until $^{166}$Sn, within the Relativistic Quasiparticle Random Phase Approximation. The great neutron excess favors the appearance of a deformed ground state for $^{142−162}$Sn. The evolution of the low-lying strength in deformed nuclei is determined by the interplay of two factors, isospin asymmetry and deformation: while greater neutron excess increases the total low-lying strength, deformation hinders and spreads it. Very neutron rich deformed nuclei may not be as good candidates as stable spherical nuclei like $^{132}$Sn for the experimental study of low-lying E1 strength. |
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Langue du texte
intégral : |
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Anglais |
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Date de production,
écriture : |
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08/12/2008 |
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| Mots Clés : |
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QRPA – RMF – pygmy – GDR – deformed |
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| Classification : |
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21.10.-k, 21.30.Fe, 21.60.Jz, 24.30.Cz, 25.20.Dc, 27.30.+t |
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