Abstract
In this work we study the properties of the collective modes in nuclear matter in the four available longitudinal channels. For the calculations we selected tour different effective interactions. The particularly successful one was the finite-range interaction with density-dependent part Dl. No instabilities appeared in any channel and the Landau parameters deduced from it reproduce satisfactorily some previous microscopic calculations with the Reid soft-core potential G-matrix. The forward scattering amplitude sum rule, satisfied to a very good accuracy with Dl, is discussed in some detail.
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