Spectroscopy of condensed matter
https://www.unitconverters.net/energy/electron-volt-to-erg.htm
https://en.wikipedia.org/wiki/Neutron_scattering
Inelastic neutron scattering study of low energy excitations in glassy 1-butene
https://en.wikipedia.org/wiki/Brillouin_spectroscopy
Low-Temperature Specific Heat and Brillouin Scattering Measurements on Hydrogen-Bonded Glasses
Miguel A. Ramos ,,, et al