Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2007-09-05
Phys.Rev.Lett.99:162503,2007
Physics
Nuclear Physics
Nuclear Experiment
Submitted to Physical Review Letters. 10 pages; 4 figures
Scientific paper
10.1103/PhysRevLett.99.162503
The strength distributions of the giant monopole resonance (GMR) have been measured in the even-A Sn isotopes (A=112--124) with inelastic scattering of 400-MeV $\alpha$ particles in the angular range $0^\circ$--$8.5^\circ$. We find that the experimentally-observed GMR energies of the Sn isotopes are lower than the values predicted by theoretical calculations that reproduce the GMR energies in $^{208}$Pb and $^{90}$Zr very well. From the GMR data, a value of $K_{\tau} = -550 \pm 100$ MeV is obtained for the asymmetry-term in the nuclear incompressibility.
Akimune Hidetoshi
Fujiwara Motoyasu
Garg Umesh
Harakeh Muhsin N.
Hashimoto Hideki
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