The Giant Monopole Resonance in the Sn Isotopes: Why is Tin so "Fluffy"?

Abstract

The isoscalar giant monopole resonance (GMR) has been investigated in a series of Sn isotopes (A=112--124) using inelstic scattering of 400-MeV alpha particles at extremely forward angles (including 0deg). The primary aim of the investigation has been to explore the role of the "symmetry-energy" term in the expression for nuclear incompressibility. It is found that the energies of the GMR in the Sn isotopes are significantly lower than those expected from the nuclear incompressibility previously extracted from the available data on the compressional-mode giant resonances.

Invited talk at COMEX2:Second International Conference on Collective Motion in Nuclei under Extreme Conditions, St. Goar, Germany, June 20-23, 2006. To be published, eventually, in Nuclear Phys. A. 8 pages, 4 figures

References in corpus (2)

• Neutron-Rich Nuclei in Heaven and Earth
• The long journey from the giant-monopole resonance to the nuclear-matter incompressibility

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