The Asymmetry Term in the Nuclear-matter Incompressibility from Measurements on the Giant Monopole Resonance: An Update

摘要

We have investigated the isoscalar giant monopole resonances (ISGMR) in ^112-124Sn and ^106-116Cd nuclei using inelastic scattering of 386-MeV lpha -particles at extremely forward angles, including 0^circ . The strength distributions for various multipoles were extracted by a multipole decomposition analysis based on the expected angular distributions of the respective multipoles. From the ISGMR results, a value of K_au sim -500 MeV is obtained for the asymmetry term in the nuclear incompressibility.