Is spin-orbit state branching in the photodissociation of CCl4 isotope specific?

We have reinvestigated the ultraviolet photodissociation of CCl4 around 235 nm. The yield of spin-orbit state excited Cl*(2P1/2) atoms was found to be 0.26 ± 0.03, independently of the isotopic mass of the chlorine atom. No evidence of isotope specific Cl* yields was observed. Our results suggest that the previously reported isotope specificity in the photodissociation of CCl4 does not exist.