Abstract
The widths of the <sup>129</sup>Xe nuclear magnetic resonance (NMR) lines of xenon in zinc- and cadmium-exchanged zeolites NaY and HY were measured at ambient temperature as a function of the xenon gas equilibrium pressure. It is demonstrated that the observed values of the linewidths as well as their quite different dependence on pressure can be explained on the basis of a theoretical approach which traces back the origin of line broadening to inhomogeneous spatial distributions of transition metal cation sites interacting strongly with the encaged xenon atoms.
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