Prospects for detecting an $\eta_c'$ in two photon processes
  We argue that an experimental search for an $\eta_c'$, the first radial excitation of the $\eta_c(2980)$, may be carried out using the two photon process $e^+e^- \to e^+e^- \gamma \gamma \ra e^+e^-\eta_c'$. We estimate the partial width $\Gamma_{\gamma \gamma}(\eta_c')$ and the branching fraction $B(\eta_c' \to h)$, where $h$ is an exclusive hadronic channel, and find that for $h = K^o_s K^\pm \pi^\mp$ it may be possible to observe this state in two photon collisions at CLEO-II. 
T. Barnes (Oak Ridge National Laboratory), T.E. Browder and S.F. Tuan   (University of Hawaii)