The behavior of shear moduli of Si have been studied during amorphization. The amorphization was achieved by irradiation with 1.8-MeV Kr ions and was monitored by means of transmission electron microscopy and Raman spectroscopy. The elastic properties were investigated using Brillouin scattering techniques. Unlike what has been observed in Nb₃Ir and Zr₃Al, where the elastic constant changes dramatically, even before the sample becomes amorphous, the elastic constants of Si change only when the sample shows signs of becoming amorphous.
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Bhadra et al. (1988) studied this question.
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