  Fragment signals in ordinary mass spectra carry no label to identify their
parent molecule. By correlating mass signals with rotational Raman spectra, we
created a method to label each ion signal with the spectroscopic fingerprint of
its neutral parent molecule. In data for a carbon disulfide molecular cluster
beam, we assigned 28 distinct ionization and fragmentation channels based on
their mass-correlated rotational fingerprints. Unexpected observations included
the formation of energetic S2 and SCCS cationic fragments from the CS2-dimer
cluster and a significant CS3 signal, uncorrelated to the dimer. The large
number of observed channels revealed a surprising complexity that could only be
addressed with correlated spectroscopy and computer-aided correlation analysis.
