American Institute of Physics, The Journal of Chemical Physics, 6(103), p. 2369
DOI: 10.1063/1.469660
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It is demonstrated that, according to semi-classical theory, the isotopic dependence of the predissociation linewidths in the Schumann-Runge bands of oxygen cannot be removed by simple scaling of the reduced mass. This is in contrast to the isotopic dependence of the predissociated vibrational energy levels.