Coulomb and Exchange Integrals

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SUMMARY

The discussion centers on the search for a comprehensive table of Coulomb and exchange integrals specifically for Lithium and other elements. Users highlight the scarcity of such resources, particularly for integrals beyond the 1s and 2s states, and suggest utilizing ab initio programs like Gaussian and Molpro to compute these integrals at various levels of theory. The CCCBDB database is recommended as a potential resource, although the likelihood of finding pre-tabulated integrals is low. A thesis link is provided as a promising reference for further exploration.

PREREQUISITES
  • Understanding of Coulomb and exchange integrals in quantum chemistry
  • Familiarity with ab initio methods and programs such as Gaussian and Molpro
  • Knowledge of basis sets and levels of theory in computational chemistry
  • Basic principles of first-order perturbation theory
NEXT STEPS
  • Research the CCCBDB database for available Coulomb and exchange integrals
  • Learn how to compute integrals using Gaussian at different levels of theory
  • Explore the thesis linked in the discussion for detailed calculations and methodologies
  • Investigate advanced topics in first-order perturbation theory for higher excited states
USEFUL FOR

Researchers, quantum chemists, and students involved in computational chemistry, particularly those focusing on ab initio calculations and the evaluation of Coulomb and exchange integrals.

bob012345
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TL;DR
I'm looking for a table of Coulomb and exchange integrals for Lithium and beyond.
Summary: I'm looking for a table of Coulomb and exchange integrals for Lithium and beyond.

I'm looking for a convenient table of Coulomb and exchange integrals for Lithium and beyond. I've looked everywhere and I find integrals for J,K 1s, 2s or 1s,2p for Helium. Does anyone know of a resource? Thanks.
 
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The integrals in question will depend on the basis set, level of theory, etc. All the standard concerns with ab initio calculations. You could look for several different limits (HF complete basis set limit, non-relativistic limit, full CI limit, etc), but the chances that someone has tabulated them are probably relatively slim. Maybe try CCCBDB.

If you have access to Gaussian or Molpro or some other ab initio program, you can usually get the program to evaluate the integrals at a desired level of theory. Best of luck.
 
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TeethWhitener said:
The integrals in question will depend on the basis set, level of theory, etc. All the standard concerns with ab initio calculations. You could look for several different limits (HF complete basis set limit, non-relativistic limit, full CI limit, etc), but the chances that someone has tabulated them are probably relatively slim. Maybe try CCCBDB.

If you have access to Gaussian or Molpro or some other ab initio program, you can usually get the program to evaluate the integrals at a desired level of theory. Best of luck.
Thanks for responding! I'm just looking for first order pertubation theory calculations for now. Many texts have 1s2s integrals for the first excited state but not higher or not beyond 1s-something such as for the Beryllium ground state. In the meantime, I've gained practice doing the integrals myself to first order. Thanks again.
 

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