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We report calculations of energy levels and oscillator strengths fortransitions in W XL, undertaken with the general-purpose relativistic atomicstructure package ({\sc grasp}) and flexible atomic code ({\sc fac}).Comparisons are made with existing results and the accuracy of the data isassessed. Discrepancies with the most recent results of S. Aggarwal et al.[Can. J. Phys. {\bf 91} (2013) 394] are up to 0.4 Ryd and up to two orders ofmagnitude for energy levels and oscillator strengths, respectively.Discrepancies for lifetimes are even larger, up to four orders of magnitude forsome levels. Our energy levels are estimated to be accurate to better than 0.5%(i.e. 0.2 Ryd), whereas results for oscillator strengths and lifetimes shouldbe accurate to better than 20%.

canadian journal of physics

Comment on "Multiconfiguration Dirac-Fock energy levels and radiative  rates for Br-like tungsten" by S. Aggarwal, A.K.S. Jha, and M. Mohan [Can .  J. Phys. 91 (2013) 394]