FIG. 2: (Color online) Decay probabilities (branching ratios) to the capture channel from various J π states of $^{239}$U. (a): positive parity states, (b): negative parity states 13 10$^{-4}$ 10$^{-3}$ 10$^{-2}$ 10$^{-1}$ 10$^{0}$  0  1  2  3  4 5 Capture probability Neutron energy (MeV) Capture 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 + 10$^{-4}$ 10$^{-3}$ 10$^{-2}$ 10$^{-1}$ 10$^{0}$  0  1  2  3  4  5 Capture probability Neutron energy (MeV) Capture 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 -