Isovector dipole strength in nuclei with extreme neutron excess
Journal Article
·
· Physical Review. C, Nuclear Physics
- Institut de Physique Nucleaire, Universite Paris-Sud, IN2P3-CNRS, F-91406 Orsay Cedex (France)
- Physikdepartment, Technische Universitaet Muenchen, D-85748 Garching (Germany)
The E1 strength is systematically analyzed in very neutron-rich Sn nuclei, beyond {sup 132}Sn until {sup 166}Sn, within the relativistic quasiparticle random phase approximation. The great neutron excess favors the appearance of a deformed ground state for {sup 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 spherical nuclei like {sup 132}Sn for the experimental study of low-lying E1 strength.
- OSTI ID:
- 21199611
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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