Electric dipole moments generated by nuclear Schiff moment interactions: A reassessment of the atoms Xe-129 and Hg-199 and the molecule (TlF)-Tl-205

We present relativistic many-body calculations of atomic and molecular Schiff-moment interaction constants including interelectron correlation effects using atomic Gaussian basis sets specifically optimized for the Schiff interaction. Our present best results employing a Gaussian nuclear density function are alpha SM=(0.362 +/- 0.025)x10(-17)ecm/efm(3) for atomic Xe-129, alpha SM=(-2.26 +/- 0.23)x10(-17)ecm/efm(3) for atomic Hg-199, and WSM=(39967 +/- 3600) a.u. for the thallium nucleus in the molecule (TlF)-Tl-205. We discuss agreements and discrepancies between our present results and those from earlier calculations on the atoms Xe-129 and Hg-199. Using the most recent measurements of P,T-odd electric dipole moments and the present interaction constants, reliable upper bounds on the Schiff moments of the Hg-199 and Tl-205 nuclei are determined in the context of a single-source assumption.