Sodium asymmetry parameters

Table 3. Quadrupole coupling constants, Cq, asymmetry parameters, 7]q, and isotropic chemical shifts, 5, (referenced to solid NaCl) of sodium cations in dehydrated zeolites NaY and NaX calculated by a point charge model (see text) and experimentally derived by solid-state Na MAS NMR spectroscopy [194,201,203] ...

The investigation of sodium as a critical test of the theoretical treatment of scattering is given a new dimension by the spin-dependent measurements of Kelley et al. (1992) in elastic and superelastic scattering experiments with polarised electrons on the polarised 3s and laser-excited 3p states. Not only have asymmetries been measured for these states, but spin-dependent observations of the magnetic substate parameter L have been made for the 3p state. 

The most negative interaction parameters are always found at cesium, the most positive values at sodium. Note that this systematic picture also applies for the energetic asymmetries, b, which are smallest for cesium and largest for sodium. Finally, we see that for a given common cation the values of b increase systematically in the sequence... 

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