Using classical molecular dynamics simulations combined with the Voronoi tessellation we study, at very low temperatures, the phonon spectrum and the geometrical modifications in a model glass as a function of the quenching rate. The shape of the phonon spectrum is not strongly affected by a decrease in the quenching rate, except for the minimum pulsation omega(m), corresponding to the first pseudo-Bragg peak wave-vector, which goes through a marked minimum for the critical quenching rate at which the onset of crystallization is detected by the geometrical analysis. This decrease in omega(m) can be interpreted as an increase in structural order in the glass phase when the cooling rate is lowered. [References: 27]
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