Effect of nuclear deformation on the electricdipole strength in the particleemission threshold region
Effect of nuclear deformation on the electricdipole strength in the particleemission threshold region
Dönau, F.; Rusev, G.; Schwengner, R.; Junghans, A.; Schilling, K. D.; Wagner, A.
The role of the deformation for the photoabsorption cross section in the tail region of the electric Giant Dipole Resonance (GDR) is studied in terms of a deformed oscillator model and a Nilssonplusrandomphaseapproximation model. It is found within the framework of these approaches that extra electric dipole strength is generated at energies below the GDR maximum if the nuclear system is spacially deformed. This is important for the prediction of the stellar photodisintegration rates knowing that an extra strength can affect these rates even belo w the particle separation energies through the socalled gamma process. Because the nuclear deformation is governed by shell effects this extra strength does not directly correlate with varying neutron numbers.
Keywords: Oscillator Model; NilssonModel; QuasiparticleRandomPhaseApproximation; nuclear deformation; Giant Dipole Resonance; photoabsorption cross section; E1 strength

Physical Review C 76(2007), 014317
DOI: 10.1103/PhysRevC.76.014317
Cited 24 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ9209
Publ.Id: 9209