The asymmetry term in the nuclear-matter incompressibility from measurements on the giant monopole resonance: An Update

TL;DR

This study measures giant monopole resonances in tin and cadmium isotopes to refine the asymmetry term in nuclear incompressibility, finding it to be approximately -500 MeV, which impacts nuclear matter models.

Contribution

It provides updated experimental data on the asymmetry term in nuclear incompressibility using inelastic alpha scattering measurements.

Findings

Determined the asymmetry term $K_{\tau} \sim -500$ MeV.

Analyzed giant monopole resonances in Sn and Cd isotopes.

Refined parameters for nuclear matter incompressibility.

Abstract

We have investigated the isoscalar giant monopole resonances (ISGMR) in $^{112-124}$Sn and $^{106-116}$Cd nuclei using inelastic scattering of 386-MeV $\alpha$-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 $K_{\tau} \sim -500$ MeV is obtained for the asymmetry term in the nuclear incompressibility.