Low lying excited states of ²⁴O investigated by self-consistent microscopic description of proton inelastic scattering

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The proton inelastic scattering of ²⁴O(p,p') at 62 MeV/nucleon is described by a self-consistent microscopic calculation with the continuum particle-vibration coupling (cPVC) method. The SLy5, SkM*, and SGII parameters are adopted as an effective nucleon-nucleon interaction. For all the parameters, the cPVC calculation reproduces very well the first peak at 4.65 MeV in the ²⁴O excitation energy spectrum as well as its angular distribution. The role of the cPVC self-energy strongly depends on the effective interactions. The higher-lying strength around 7.3 MeV is suggested to be a superposition of the 3- and 4+ states by the results with SLy5 and SGII, whereas the SkM* calculation indicates it is a pure 3- state. This difference gives a rather strong interaction dependence of the angular distribution corresponding to the higher-lying strength.