We present the single stellar population ( SSP ) synthesis results of our new synthetic stellar atmosphere models library with a spectral sampling of 0.3 Å , covering the wavelength range from 3000 Å to 7000 Å for a wide range of metallicities ( twice solar , solar , half solar and 1/10 solar ) .
The stellar library is composed of 1650 spectra computed with the latest improvements in stellar atmospheres .
In particular , it incorporates non-LTE line-blanketed models for hot ( T _ { eff } \geq 27500 K ) , and LTE line-blanketed models ( Phoenix ) for cool ( 3000 \leq T _ { eff } \leq 4500 K ) stars .
Because of the high spectral resolution of this library , evolutionary synthesis models can be used to predict the strength of numerous weak absorption lines and the evolution of the profiles of the strongest lines over a wide range of ages .
The SSP results have been calculated for ages 1 Myr to 17 Gyr using the stellar evolutionary tracks provided by the Geneva and Padova groups .
For young stellar populations , our results have a very detailed coverage of high-temperature stars with similar results for the Padova and Geneva isochrones .
For intermediate and old stellar populations , our results , once degraded to a lower resolution , are similar to the ones obtained by other groups ( limitations imposed by the stellar evolutionary physics notwidthstanding ) .
The limitations and advantages of our models for the analysis of integrated populations are described .
The full set of the stellar library and the evolutionary models are available for retrieval at the websites http : //www.iaa.csic.es/ \sim rosa and http : //www.iaa.csic.es/ \sim mcs/Sed @ , or on request from the first two authors .