Fig. 2
State dependent isotope effect of the photodissociation branching ratios. The comparisons of the raw time-slice velocity map imaging (TSVMI) images and the corresponding total kinetic energy release (TKER) spectra between the photodissociations of 12C16O and 13C16O for the absorption bands with upper states of 1Π(v′ = 2) (a, b, e, f), (5pπ) 1Π(v′ = 0) (c, d, g, h), C′1Σ+(v′ = 7) (i, j, m, n) and I′(5sσ) 1Σ+(v′ = 0) (k, l, o, p). The outermost, middle and innermost rings in the TSVMI images are corresponding to the peaks with largest (2.0–2.3 eV), medium (0.8–1.0 eV) and smallest (0.1–0.3 eV) kinetic energies in the TKER spectra, respectively. The heights of the three peaks are rescaled by setting the highest peak in each spectra to 1. The underneath areas of the peaks represent the relative intensities (or branching ratios) of the three photodissociation channels C(3P)+O(3P), C(1D)+O(3P) and C(3P)+O(1D) respectively after normalization by using the photoionization cross sections of C(3P) and C(1D) (see Methods)
