Abstract
Collision strengths and Maxwellian averaged collision rates are calculated for intercombination and forbidden transitions from the 1s2 1S ground state to the 1s2l and 1s3l levels in He-like Ni XXVII, using the Dirac and Breit-Pauli R-matrix codes. The collision strength data at energies of E = 574 and E = 674 Rydbergs, and the collision rate data at log Te = 7.2 and log Te = 8.1 are compared with previous calculations and are generally found to be in good agreement, but to differ significantly in a few cases.
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