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Isotopic dependence of the giant monopole resonance in the even-A ¹¹²⁻¹²⁴Sn isotopes and the asymmetry term in nuclear incompressibility

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arxiv 0709.0567 v1 pith:5HUCZJUS submitted 2007-09-05 nucl-ex

Isotopic dependence of the giant monopole resonance in the even-A ¹¹²⁻¹²⁴Sn isotopes and the asymmetry term in nuclear incompressibility

classification nucl-ex
keywords isotopescircenergieseven-agiantincompressibilitymonopolenuclear
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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