FIG. 1: (Color online) Decay probabilities (branching ratios) to the fission channel from various J π states of $^{239}$U. (a) : positive parity states, (b): negative parity states 12 0 0.1 0.2 0.3 0  1  2  3  4 5 Fission probability Neutron energy (MeV) Fission probability for U-238+n positive parity states (a) J =1/2 + J =5/2 + J =9/2 + J =13/2 + J =17/2 + J =21/2 + 0 0.1 0.2 0.3  0  1  2  3  4  5 Fission probability Neutron energy (MeV) Fission probability for U-238+n negative parity states (b) J =1/2 - J =5/2 - J =9/2 - J =13/2 - J =17/2 - J =21/2 -