We investigate the Gamow-Teller (GT) response functions at a momentum transfer of $q=0{\mathrm{fm}}^{-1}$ and the pionic response functions for quasielastic scattering (QES) at $q\approx 1.7{\mathrm{fm}}^{-1}$ using the continuum random phase approximation with the $\pi +\rho +g^{\text{'}}$ model interaction. The Landau-Migdal (LM) parameters, $g_{\mathit{NN}}^{\text{'}}$ and $g_{N\Delta }^{\text{'}}$, are estimated by comparing the calculations with recent experimental data. The peak of the GT resonance and the pionic response functions below the QES peak constrain $g_{\mathit{NN}}^{\text{'}}$, whereas the quenching of the GT total strength and the enhanced pionic strength around the QES peak provide information about $g_{N\Delta }^{\text{'}}$. We obtained $g_{\mathit{NN}}^{\text{'}}=0.6\pm 0.1$ and $g_{N\Delta }^{\text{'}}=0.35\pm 0.16$ at $q=0{\mathrm{fm}}^{-1}$ and $g_{\mathit{NN}}^{\text{'}}=0.7\pm 0.1$ and $g_{N\Delta }^{\text{'}}=0.3\pm 0.1$ at $q\approx 1.7{\mathrm{fm}}^{-1}$. These results indicate that the q dependence of the LM parameters is weak.

• Received 8 October 2004

DOI:https://doi.org/10.1103/PhysRevC.72.067303