Skyrme-Random-Phase-Approximation description of E1 strength in 92-100Mo

Details Skyrme-Random-Phase-Approximation description of E1 strength in 92-100Mo Skyrme-Random-Phase-Approximation description of E1 strength in 92-100Mo

2008-11-28

arxiv.org/abs/0811.4741v1

Int.J.Mod.Phys.E18:975-985,2009

Physics

Nuclear Physics

Nuclear Theory

12 pages, 7 figures, to be published in Int. J. Mod. Phys. (E) as contribution to Proceedings of 15th Nuclear Physics Workshop

Scientific paper

10.1142/S0218301309013129

The isovector dipole E1 strength in Mo isotopes with A=92,94,96,98,100 is analyzed within the self-consistent separable random-phase approximation (SRPA) model with Skyrme forces SkT6, SkM*, SLy6, and SkI3. The special attention is paid to the low-energy region near the particle thresholds (4-12 MeV), which is important for understanding of astrophysical processes. We show that, due to a compensation effect, the influence of nuclear deformation on E1 strength below 10-12 MeV is quite modest. At the same time, in agreement with previous predictions, the deformation increases the strength at higher energy. At 4-8 MeV the strength is mainly determined by the tail of E1 giant resonance. The four Skyrme forces differ in description of the whole giant resonance but give rather similar results below 12 MeV.

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