Isoscalar and isovector dipole mode in {beta}-stable and drip line nuclei
- Center for Mathematical Sciences, University of Aizu Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580 (Japan)
- Department of Mathematical Physics Lund Institute of Technology at University of Lund, Lund (Sweden)
The isoscalar and the isovector dipole mode in nuclei are investigated, using the self-consistent Hartree-Fock plus the random-phase approximation with Skyrme interactions. Including simultaneously both the isoscalar and the isovector correlation, the RPA response function is estimated in the coordinate space so as to take into account properly the continuum effect. In {beta}-stable nuclei such as {sup 208}Pb the frequency of the isovector giant dipole resonance (IVGDR) is lower than that of the isoscalar giant dipole resonance (ISGDR, compression mode). In contrast, in higher drip line nuclei a major part of the isoscalar compression dipole strength lies at an energy much lower than the energy of the IVGDR, due to the threshold effect of loosely-bound nucleons. The transition densities and displacement fields of ISGDR and IVGDR are discussed in comparison with collective model predictions.
- OSTI ID:
- 21208208
- Journal Information:
- AIP Conference Proceedings, Vol. 481, Issue 1; Conference: Nuclear structure 98 conference, Gatlinburg, TN (United States), 10-15 Aug 1998; Other Information: DOI: 10.1063/1.59510; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structure of giant quadrupole resonances in neutron drip line nuclei
Isoscalar and isovector giant resonances in 92,94,96,98,100$\mathrm{Mo}$ and 90,92,94$\mathrm{Zr}$