Energy levels and activation energies can be acquired much more simply from Fourier Transform - Ion Cyclotron Resonance - Mass Spectroscopy...
Its a device that makes and analyzes at the same time, check out this primer:
https://warwick.ac.uk/fac/sci/chemistry/research/oconnor/oco...
Or as another example, I'm currently at a conference listening to a PhD student's research on biomolecular structure prediction (for protein design).