While from a theoretical point of view "it's enough to measure the V(z)" to gain access to the elastic moduli, in practice the problem proves more complex, as in UO
2
(irradiated or not) the V(z) shows only one periodicity due to the Rayleigh wave (figure
5
). The periodicity due to the longitudinal wave and necessary to estimate E and G is too weak to be exploited accurately.
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