F. Pichierri et al., MASS DEPENDENCE FROM STATISTICAL-ANALYSIS OF STRETCHING VIBRATIONAL LEVELS - APPLICATION TO THE LINEAR TRIATOMIC MOLECULE CS2, Chemical physics letters, 236(6), 1995, pp. 543-546
Vibrational spectra of polyatomic molecules depend on the atomic masse
s. Using the CS2 molecule as an example, a statistical analysis is per
formed for the stretching vibrational energy levels as a function of t
he isotopic masses. It is found that both the nearest-neighbour level
spacing distribution and Delta(3) statistics are modified by isotopic
substitution which should have experimental consequences.