2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/191146The validity of a model treating the short-range correlations up to the first order is studied by calculating the charge response of an infinite system and comparing the obtained results with those of a Fermi Hypernetted Chain calculation.6 pages, 3 Postscript figures, to be published on Phys. Rev. CNuclear Theorytext