Nearly a 1000 (X) over tilde <- (B) over tilde transitions of jet-cooled SCCl2 have been measured by stimulated emission pumping. The observed rovibrational band contours cover the 210-330 THz region. A statistical autocorrelation analysis of the spectra answers a key question about the state space model of vibrational energy flow: is the dilution factor a. which describes how many eigenstates participate in an optically 'bright' state due to anharmonic mixing, distributed according to a bimodal probability distribution P(sigma) or not? Our SEP data supports a bimodal distribution predicted by state space models. (c) 2005 Elsevier B.V. All rights reserved.