1 Introduction

The need for reliable atomic data in the study of astrophysical problems is well-known (see, e.g., the summary by Baschek [1995]). In spectrum synthesis work, particularly as applied to chemically peculiar (CP) stars, accurate knowledge of transition probabilities and oscillator strengths for heavy and rare-earth elements (REE) is essential to establishing reliable abundances for these species. Available data of this type for the first and second spectra of the lanthanide REE are spotty (see Fig. 2 in Wiese et al. [1995]), but very little is known about the gf-values for the third spectra of these elements. Since features associated with doubly ionized lanthanide REE are increasingly being identified in high-dispersion, high signal-to-noise spectra of CP stars (see Leckrone et al. [1998]; Cowley et al. [1998], [2000]; Ryabchikova et al. [1999]), it is becoming critically important for our understanding of the atmospheric structure and abundance patterns in these stars to have more information about the atomic parameters characterizing these species.

In an attempt to meet this need, our group has carried out ab initio calculations of oscillator strengths for Laii (Bord et al. [1996]), Ceiii (Bord et al. [1997]), Ndiii (Cowley & Bord [1998]), and Luii (Bord et al. [1998]) using the Cowan code (Cowan [1981,1985]), and we have applied these results in abundance analyses of several CP stars and the Sun. In this paper, a more expansive list of gf-values for predicted features of Ndiii than was given in our earlier work on $\gamma$Equulei and HR6870 is presented. Landé g-factors are also tabulated so that magnetic field effects may be modeled in cases where they are expected to be important. In what follows, the methodology employed in carrying out these calculations is briefly discussed (Sect. 2) before the results are introduced in Sect. 3. Section 4 contains some commentary on the expected accuracy of the results based on comparisons with existing data. Section 5 concludes with some applications of the data that are currently being made by our group.