Nuclear matter incompressibility coefficient in relativistic and nonrelativistic microscopic models
B. K. Agrawal, S. Shlomo, V. Kim Au
Abstract
We systematically analyze the recent claim that nonrelativistic and relativistic mean field (RMF) based random phase approximation (RPA) calculations for the centroid energy E0 of the isoscalar giant monopole resonance yield for the nuclear matter incompressibility coefficient, Knm, values which differ by about 20%. For an appropriate comparison with the RMF based RPA calculations, we obtain the parameters for the Skyrme force used in the nonrelativistic model by adopting the same procedure as employed in the determination of the NL3 parameter set of an effective Lagrangian used in the RMF model. Our investigation suggest that the discrepancy between the values of Knm predicted by the relativistic and nonrelativistic models is significantly less than 20%.
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