从包含介子的非线性自相互作用的有效Lagrangians出发,用相对论无规位相近似研究了核的同位旋标量和同位旋矢量巨共振。在动量空间由系统的作用量的二次变分解出了介子的传播子。计算中没有考虑核子-反核子的激发,这与基于这些有效Lagrangians的相对论平均场近似是自洽的。研究 Starting from the effective Lagrangians containing non-linear self-interactions of meson, the isochronous scalar and isostrophic giant resonance of the nucleus are studied by the relativistic random approximation. The meson propagator is solved by the quadratic variation of the system’s action in the momentum space. Exclusion of nuclear-anti-nuclear excitation from the calculations is self-consistent with the relativistic mean field approximation based on these effective Lagrangians. the study