出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present the determinations of the barium abundance taking into account the non-LTE (NLTE) effects in 173 dwarf stars belonging to the thin and thick disks. The NLTE profiles of the unblended Ba II lines (4554, 5853, 6496 ÅÅ) have been computed and compared to the observed profiles. The line 6141 Å was also used, but taking into account an influence of iron line. We used a modified version of the MULTI code and atomic model of Ba atom with 31 levels of Ba I, and 101 levels of Ba II. Atmosphere models of investigated stars have been calculated with ATLAS9 code (modified using the New Opacity distribution functions by Castelli & Kurucz). The obtained trend in the Ba abundance vs. [Fe/H] suggests a complex process of the Ba production in the thin and thick disks.
