Reference Label Details
Takahashi 1997K. Takahashi, M. Kishigami, N. Taniguchi, Y. Matsumi, and M. Kawasaki, J. Chem. Phys. 106, 6390-6397 (1997)
Photofragment Excitation Spectrum for O (1D) from the Photodissociation of Jet-Cooled Ozone in the Wavelength Range 305–329 nm
note O3cTakahashi 1997 report an onset for O3 -> O(1D) + O2(a 1Deltag) of 310.2 +- 0.2 nm. They combine it with nu00 for O2 (X 3Sigmag- <- a 1Deltag) of 7882.39 cm-1 from Herzberg 1947 also reported in Huber 1979 and with O(1D) energy of 15867.7 cm-1 to obtain D0(O3) = 101.53 +- 0.25 kJ/mol. Let us assume for a moment that the onset of 310.2 +- 0.2 nm = 32237.3 +- 20.8 cm-1 refers to O3 -> O(1D) + O2(a 1Deltag, J=2). The band head nu00 of Herzberg refers to a hypothetical vibrationless J=0 <- J=0 transition O2 (X 3Sigmag- <- a 1Deltag). The actual transition from the lowest existing level O2(X 3Sigmag-, N=1, F3) to the lowest existing level O2(a 1Deltag, J=2) is calculated as 7892.05 cm-1 using constants from Huber 1979 (the same procedure reproduces the RR and RQ lines from Herzberg 1947 within 0.01 cm-1). The excitation of O(1D2) is 15867.862 cm-1. With these one obtains O3 -> O(3P2) + O2(X 3Sigmag-, N=1, F3) as 8477.4 +- 20.8 cm-1 = 101.41 +- 0.25 kJ/mol. If, however, the onset refers to the hypothetical J=0 level of O2(a 1Deltag), then the result has to be increased by 8.507 cm-1 = 0.10 kJ/mol, yielding 101.51 +- 0.25 kJ/mol, which - because of cancellation of errors - is only 0.02 kJ/mol lower than their original value.