Triple differential cross section measurements in H2 and D2

Triple differential cross sections (TDCS) for double photoionization in H-2 and D-2 (for comparison also in helium) have been measured for equal energy sharing, E-1 = E-2 = 10 eV. In agreement with previous observations by the Reddish group and in comparison to the equivalent helium case, our D-2 data confirm a 'narrowing' effect in the correlation factor which influences the observed TDCS lobes, as well as a 'filling-in' effect at relative angles theta(1,2) = 180 degrees. However, we do not confirm the previous differences in the magnitude of D-2 and H-2 TDCS values. Instead, we get equal TDCS strengths and, in comparison to helium, reasonable agreement with the corresponding total cross section ratio for double photoionization in He and D-2.