Spin-isospin responses of nuclei — Gamow-Teller response functions and pionic response functions in the quasi-elastic scattering region

Recent elaborate experiments of (p,n) and (n,p) reactions provide detailed information about spin-isospin responses of nuclei at two different energy-momentum regions. One is the Gamow-Teller (GT) response function at small energy and momentum transfers (ω,q), and the other is the pionic response functions in the quasi-elastic scattering (QES) region at relatively large q(≈1.7)fm−1. The measured GT strength distributions and isovector spin-longitudinal cross sections IDq in the QES region are analyzed in the same theoretical framework of the distorted wave impulse approximation with the continuum random phase approximation (CRPA) including the Δ-isobar degree of freedom. As the effective interactions for the CRPA, the π+ρ+g′ model interactions are utilized. The Landau-Migdal parameters and , which specify the effective interactions, are determined for the two different (ω,q) regions.