MOMENT COUPLING IN THE INTERACTION OF ATOMS AND THEIR IONS WITH A 3d-ELECTRON SHELL
Kosarim A.V., Smirnov B.M., Capitelli M., Laricchiuta A.

Received: November 22, 2010

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The moment coupling of an interacting ion and atom with a 3d-electron shell is analyzed for the ground state of identical atoms and ions where resonant charge exchange proceeds with transition of a 4s-electron. The interaction of the ion charge with the atom quadrupole moment is important for this system along with the exchange interactions and spin-orbital interactions inside an isolated atom and ion. The quadrupole moment for 3d-atoms in the ground states is evaluated. The hierarchy of interactions in a molecular ion is analyzed depending on ion-atom distances and is compared with the standard Hund scheme. The resonant charge exchange proceeds effectively at separations corresponding to an intermediate case between cases ``a'' and ``c'' of the Hund coupling scheme.