  Succeeding our previous finding about coherent interference of the resonant
states of CO^- formed by the low-energy electron attachment [Phys. Rev. A 88,
012708 (2013)], here we provide more evidences of the coherent interference, in
particular, we find the state configuration change in the interference with the
increase of electron attachment energy by measuring the completely backward
distributions of the O^- fragment ion of the temporary CO^- in an energy range
11.3-12.6 eV. Therefore, different pure states, namely, coherent resonances,
can be formed when the close-lying resonant states are coherently superposed by
a broad-band electron pulse.
