The experimental data for the analysis in this work was extracted from Ref. 18. The RISRS experiment was performed in a pump-probe transmission geometry. The data was acquired using a pump photon energy of 3.06 eV, average power of 300 µW at a pulse repetition rate of 100 kHz, focused to a 1.9-mm spot diameter. The oscillatory component of the transient absorption signal between the energies 2.34 and 2. Beating Energy (meV) (e) 100 K The CWT was implemented using the open source wavelet transform software for Python under MIT license . A complex Morlet wavelet was employed for the analysis, equation S1, with parameters B and C equal to 50 and 1 respectively. The wavelet transform is defined as equation S2, were W (τ, s) are the wavelet coefficients. It can be noted that if f (t) corresponds to a damped oscillation the |W (τ, s)| will not have an oscillatory component in τ .