Low Lying Magnetic and Electric Dipole Strength Distribution in the Even-Even 164-170Er

Journal Article · Mon Apr 23 04:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2733060· OSTI ID:21057093

Ertugral, F; Kuliev, A A ^[1]; Guliyev, E ^[2]

---

1. Sakarya University, Physics Department, Adapazari (Turkey)
2. Institute of Physics, National Academy of Sciences, H.Cavid Avenue 33, Baku (Azerbaijan)

Quasiparticle random-phase approximation calculations, where rotational and translational invariance are restored selfconsistently by using separable effective forces, are presented for the ground state dipole response in the even-even 164-170Er isotopes. We consider the 1+ vibrations generated by the isovector spin-spin interactions and the isoscalar and isovector quadrupole type separable forces restoring the broken symmetry by a deformed mean field. It has been shown that restoration of the broken rotational and translational symmetry of the Hamiltonian essentially decrease the B(M1) and the B(E1) values of the low lying 1+ and 1- states and increase the collectivization of the scissors mode and the electric dipole mode excitations in the spectroscopic energy region. The resulting M1 and E1 spectrum are compared with available experimental data. The calculated dipole strengths summed in the energy range 1.8-4 MeV are in agreement with the relevant experimental data. In this nuclei theory predicts many more low-lying 1+ and 1- states than experiment.

• OSTI ID: 21057093
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 899; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLLECTIVE MODEL
E1-TRANSITIONS
ELECTRIC DIPOLES
ELECTRIC MOMENTS
ERBIUM 164
ERBIUM 170
EXCITATION
GROUND STATES
HAMILTONIANS
J-J COUPLING
M1-TRANSITIONS
MAGNETIC MOMENTS
MEAN-FIELD THEORY
MEV RANGE
NUCLEAR STRUCTURE
PARITY
QUASI PARTICLES
RANDOM PHASE APPROXIMATION
S STATES
SYMMETRY BREAKING