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Rezső Gáspár

Gaspar

Born February 2nd, 1921 in Érsekvadkert, Hungary. Professor of Research at Institute of Theoretical Physics, Kossuth Lajos University, Debrecen, Hungary.

State Prize for activity in quantum chemistry (1965); Member of Hungarian Academy of Sciences (1970–); Member of the International Academy of Quantum Molecular Sciences (1974); Member of the European Academy of Arts and Sciences.

Author of:

More than 135 scientific papers in density functional theory and pseudopotential theory of the electronic structure of atoms, molecules and solids.

Important Contributions:

  • Exchange operator originating from (1/8)n4 two-electron integrals can be approximated by an exchange potential αCρ1/3, where n and ρ are the number of basis functions and the density, respectively. Kohn–Sham–Gáspár potential.
  • First theoretical determination of the electron affinity of Na and K with pseudopotential method and correlation in studying the ions Na- and K- that may have an important role in astrophysics.
  • First interpretation of the electronic structure and properties of the semiconductors Se and Te on the basis of real crystal structure/group theory.
  • Foundation and applications of the one-center or united-atom model of molecules. Theoretical interpretation of the properties of the metal Al. Studies on pseudopotentials and the method of molecular fragments.

An obituary can be found at
http://www.matud.iif.hu/02apr/nagy.html.