Why is Tin so soft?

Details Why is Tin so soft? Why is Tin so soft?

2007-05-10

arxiv.org/abs/0705.1491v1

Phys.Rev.C76:031301,2007

Physics

Nuclear Physics

Nuclear Theory

5 pages, 3 figures to be submitted to PRC

Scientific paper

10.1103/PhysRevC.76.031301

The distribution of isoscalar monopole strength in the neutron-even 112-124Sn-isotopes has been computed using a relativistic random-phase-approximation approach. The accurately-calibrated model used here (``FSUGold'') has been successful in reproducing both ground-state observables as well as collective excitations - including the giant monopole resonance (GMR) in 90Zr, 144Sm, and 208Pb. Yet this same model significantly overestimates the GMR energies in the Sn isotopes. It is argued that the question of ``Why is Tin so soft?'' becomes an important challenge to the field and one that should be answered without sacrificing the success already achieved by several theoretical models.

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