  Bilodeau and Haugan [1], using Infrared laser photodetachment spectroscopy,
measured the binding energies (BEs) of the ground state (4Fe9/2) and the
excited state (4Fe7/2) of the Os^- ion to be 1.07780(12) eV and 0.553(3) eV,
respectively. These values are consistent with those calculated using
Relativistic Configuration Interaction (RCI) calculations [2]. Here we have
calculated the BEs for the ground state and the two excited states of the Os^-
ion using our recent complex angular momentum (CAM) methodology [3] and
obtained the BEs of 1.910, 1.230 and 0.224 eV, respectively (see Figure). We
conclude that: 1) the measured value of 1.07780(12) eV corresponds to an
excited state of Os^- and not to the EA of Os and 2) the EA of Os is 1.910 eV.
