Dirac-Fock-Roothaan calculations on the atoms Tl-Rn have been performed using orbital exponent parameters of Fzgri's nonrelativistic Hartree-Fock Gaussian basis sets. Calculations using Fiegri's (22s, 17p, 13d, 8f) basis sets augmented by two 2p basis functions have produced wavefunctions close to t
Comments on the basis spinors in Dirac-Fock-Roothaan calculations
β Scribed by Osamu Matsuoka
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 189 KB
- Volume
- 155
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
It is noted that two kinds of basis spinors (the unified and the separated basis spinors) employed in Dirac-Fock-Roothaan calculations are equivalent. For large components of the basis spinors the separated basis spinors take simpler forms than the unified ones while for small components the reverse is true when the kinetic energy balance scheme is adopted.
π SIMILAR VOLUMES
Gaussian basis sets for atomic one-electron systems have been optimtzed by straight mmtmr~atron of the electronic ground-state eigenvalue of the finite basis set representation of the Dirac operator, using the "kinetic energy balance" procedure in conjunction with appropriate additional variational
The frequency-independent Breit interaction is treated self-consistently in Dirac-Fock Gaussian basis set calculations on the Be atom and Ne6+, Arr4+ and Sn46+ Ions. The results of the calculations on Be are in excellent agreement with both Desclaux's benchmark numerical pcrturbative calculations an
Analysis of the restrIcted Hartree-Fock (RHF) ewhange potentml IS presented. In po1ymer.c chams, a reIatmn between the short-rangeness of the exchange and the ener\_w gap IS observed. In metalhc systems, the exchange IS of long-range and correlation corrections are expected to be unportant The vahdl