The isovector dipole strength in nuclei with extreme neutron excess

Abstract : 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.
keyword : QRPA RMF pygmy GDR deformed
Document type :
Preprints, Working Papers, ...
2008


https://hal.archives-ouvertes.fr/hal-00345965
Contributor : Daniel Pena Arteaga <>
Submitted on : Wednesday, December 10, 2008 - 4:40:04 PM
Last modification on : Wednesday, December 10, 2008 - 5:27:46 PM

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  • HAL Id : hal-00345965, version 1
  • ARXIV : 0812.1952

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Daniel Pena Arteaga, E. Khan, Peter Ring. The isovector dipole strength in nuclei with extreme neutron excess. 2008. <hal-00345965>

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