2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3586In this poster line strength indices for new Single Stellar Populations (SSP) based on the recent stellar models with chemical compositions enhanced in the alpha-elements (Salasnich et al. 2000) are presented. The SSP indices have been calculated taking into account different methods to correct the "Standard-Worthey Indices" for the real chemical composition of alpha-enhanced isochrones.2 pages, newpasp documentstyle, poster contribution to the workshop: "Tracing cosmic evolution with galaxy clusters", Sesto Pusteria, 2001Astrophysicstext