Title: ELECTRON IMPACT EXCITATION OF Gd XXXVI

Authors: K. M. Aggarwal$^\ast$, P. H. Norrington$^\sharp$, K. L. Bell$^\sharp$, F. P. Keenan$^\ast$,
         G. J. Pert$^\dag$ and S. J. Rose$^\ddag$

Affiliations: $^\ast$Department of Pure \& Applied Physics, Queen's University, Belfast BT7 1NN, UK 
              $^\sharp$Dept. of Applied Maths. \& Theoretical Physics, Queen's University, Belfast
              BT7 1NN, UK
              $^\dag$Department of Physics, York University, York YO10 5DD, UK\\
              $^\ddag$Plasma Physics Group, Rutherford Appleton Lab., Oxon OX11 0QX, UK

Summary: Energy levels and radiative rates for transitions among the 107 fine-structure levels belonging to the (1s$^2$2s$^2$2p$^6$) 3s$^2$3p$^6$3d$^{10}$, 3s$^2$3p$^6$3d$^9$4$\ell$, 3s$^2$3p$^5$3d$^{10}$4$\ell$, and 3s3p$^6$3d$^{10}$4$\ell$ configurations of Ni-like Gd XXXVII\ have been calculated using the GRASP code. The collision strengths have also been computed, at 4 representative energies of 200, 400, 600 and 800 Ryd,  using the Dirac $R$-matrix code. Detailed calculations for collision strengths and rate coefficients are in progress.