摘要
A full relativistic formalism is employed to derive the relativistic particle-hole and delta-hole excitation polariza tion insertion of pion propagator in nuclear matter.The spin-isospin-dependent response function of nucleus at high energy-momentum transfer is calculated with the nuclear matter approximation.The short range correlation effect,two-nucleon absorption and nucleus form factor effects are included in the calculation.The position and width of the resonance peak of the spin-isospin mode are reproduced and found to be coincident with experiment data.The position of the peak and its width is sensitive to Landau-Migdal parameter g'which is about 0.6.
基金
Supported by the National Natural Science Foundation of China under Grant No.19775072
the Guangdong Provincial Natural Science Foundation(970130).
