GDR as used in the evaluation of JENDL Actinoid File 2008[17] were used. Therefore, the present calculation contains realistic information of the characteristics of participating nuclei adjusted to reproduce neutron cross sections. Figures 1 and 2 shows the branching ratios (decay probabilities) to the fission (Fig. 1) and capture (Fig. 2) channels for various J π states of $^{239}$U up to J π = (21/2) ± and neutron energy of 5 MeV. The upper panels in Figs. 1 and 2 show branching ratios from positive parity states, while the lower ones denote those from negative parity states. If the Weisskopf-Ewing condition is fulfilled, the various lines in these figures must coincide (at least approximately); if it is the case both of the surrogate absolute and ratio methods can be justified. However, Fig. 1 shows that the fission decay ratio varies depending on J π by about 15 % at 5 MeV but variation is about 50 % at 1.5 MeV. The convergence is much worse for the capture channel as shown in Fig. 2; the branching ratios scatter by a factor of about 10 at 5 MeV, and the variation is much larger at lower energies. Therefore, we have to conclude that there is only little hope to use surrogate method to determine neutron capture cross sections at these energies, since the low-energy neutron-induced reactions bring only small angular momentum to the compound system in general, while the surrogate method will bring much more. The absolute surrogate method, therefore, will never work to measure capture cross sections unless the spin-parity distribution between the neutron-induced and surrogate reactions are fairly close to each other or the difference is corrected theoretically. It will be also only marginally applicable to measure the fission cross sections. However, the J π dependence of the branching ratios to the fission and capture reactions show rather systematic behaviors. Above 2.5 MeV, the fission probability shown in Fig. 1 increases monotonically as J increases. Same trend is true for the capture reaction. Since it was found also to be true for other compound nuclei in this mass region, $^{236}$U and $^{237}$U (not shown here), we may expect that there is a possibility to cancel out the large J π dependence by taking ratios of the branching ratios for each J $^{π}$. We have done such calculations and the results are shown in Figs. 3 and 4. Figure 3 shows the ratios of fission probabilities (branching ratios) for $^{239}$U and $^{237}$U for various values of J $^{π}$. We can notice an astonishingly good convergence. The thick black line denotes the ratios of the neutron fission probabilities ( σ n $_{f}$/σ n $_{R}$) for the corresponding neutron-induced reactions. All the curves converges to the ratio of the neutron fission probabilities very well. The deviation is only a level of 3 % at 5 MeV. The largest scatter lies at about 1.6 MeV, but the scatter around the neutron curve is 5