Energy levels, radiative rates, and lifetimes for transitions in W XL

Kanti M. Aggarwal*, Francis P. Keenan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Energy levels and radiative rates are reported for transitions in Br-like tungsten, W XL, calculated with the general-purpose relativistic atomic structure package (grasp). Configuration interaction (CI) has been included among 46 configurations (generating 4215 levels) over a wide energy range up to 213 Ryd. However, for conciseness results are only listed for the lowest 360 levels (with energies up to ~43 Ryd), which mainly belong to the 4s24p5,4s24p44d,4s24p44f,4s4p6,4p64d,4s4p54d,4s24p34d2, and 4s24p34d4f configurations, and provided for four types of transitions, E1, E2, M1, and M2. Comparisons are made with existing (but limited) results. However, to fully assess the accuracy of our data, analogous calculations have been performed with the flexible atomic code, including an even larger CI than in grasp. Our energy levels are estimated to be accurate to better than 0.02 Ryd, whereas results for radiative rates (and lifetimes) should be accurate to better than 20% for a majority of the strong transitions.

Original languageEnglish
Pages (from-to)1399-1518
JournalAtomic Data and Nuclear Data Tables
Early online date18 Aug 2014
Publication statusPublished - Nov 2014


  • Energy levels
  • Lifetimes
  • Line strengths
  • Oscillator strengths
  • Radiative rates

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Energy levels, radiative rates, and lifetimes for transitions in W XL'. Together they form a unique fingerprint.

Cite this