Radiative Rates, Collision Strengths and Effective Collision Strengths for Transitions in Gd XXXVII

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Energy levels and radiative rates for transitions among 107 fine-structure levels belonging to the (1s22s22p6) 3s23p63d10, 3s23p63d94l, 3s23p53d104l, and 3s3p63d104l configurations of Ni-like Gd XXXVII have been calculated using the fully relativistic GRASP code. Radiative rates and oscillator strengths are tabulated for all allowed transitions among these levels. Additionally, collision strengths for transitions among the lowest 59 levels have been computed using the Dirac Atomic R-matrix Code. Resonances in the threshold region have been delineated, but results for collision strengths are tabulated only at energies above thresholds in the range 120 ≤ E ≤ 800 Ry. Effective collision strengths, obtained after integrating the collision strengths over a Maxwellian distribution of electron velocities, have also been calculated and are tabulated over a wide electron temperature range of 105.0 to 107.7 K. Our energy levels are assessed to be accurate to within 1%, while oscillator strengths, collision strengths, and effective collision strengths for all strong transitions are probably accurate to better than 20%.