Charge exchange near-resonant

Fig. 3. Charge exchange mechanisms near a metal surface (a) Auger process, (b) resonant process. The atomic energy level is shown as a function of the distance to the surface.

The outstanding feature of the near resonant charge exchange considered here is that the inner-shell orbitals under study are well separated from higher-lying orbitals. As a consequence, the theoretical analysis of the near-resonant charge exchange may be restricted to a few basis states. 

The resonance study (6 ) of B10H12I2 establishes that the I atoms are substituted on the two B s giving B peaks at highest field. It is important that in this and the following B resonance studies of substituted boron hydrides, the positions of boron resonances are but little shifted from their relative positions in the pure hydrides. This discovery has made the field of substituted boron hydrides easily studied by NMR techniques, and should lead to the identification of presently unassigned resonance peaks in the pure hydrides themselves and provide a basis for studies of internal exchange reactions. Thus, we can expect more detailed analyses of the charge distributions in both the hydrides and their substitution products to appear in the near future. 

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