Density fluctuations in α-decay self-irradiated zircon

Rios, Susana; Salje, Ekhard K. H.
March 2004
Applied Physics Letters;3/22/2004, Vol. 84 Issue 12, p2061
Academic Journal
Small-angle x-ray scattering (SAXS) intensities measured in a series of natural zircons, from fully crystalline to fully amorphous, give evidence for nanoscale density fluctuations within the amorphous phase produced by α-decay self-irradiation. At low amorphous fractions (p<0.5), the SAXS intensity is dominated by the signal associated with the sharp crystalline/amorphous interphase. At high amorphous fractions (p>0.8) a peak at Q=3 nm[sup -1] develops, indicating the presence of 1 nm diameter regions that show a high-density contrast with the surrounding matrix. Density fluctuations are interpreted in terms of nanometer size voids. © 2004 American Institute of Physics.


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