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A: Fachverband Atomphysik
A 20: Poster Session I
A 20.34: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1
Transition rates of E1, M1, E2 and M2 transtions in Ni XII — •Moazzam Bilal1,2, Randolf Beerwerth1,2, and Stephan Fritzsche1,2 — 1Helmholtz-Institut Jena, Germany — 2Friedrich-Schiller-Universität, Jena, Germany
Lines from Cl-like Ni XII have been observed in soft X-rays and EUV range from n = 3 → 3 transitions in spectra of sun and many solar type stars. These lines are also important in the Tokamak plasma. We report systematically enlarged calculations for allowed E1 and optically forbidden transitions (M1, E2, M2) among the fine structure levels of 3s23p5, 3s3p6 and 3s23p43d configurations. We incorporated QED effects along with the effects of relativity, electron correlation and rearrangement of the electron density. We found that Breit interactions and leading QED corrections have reasonable effects on Dirac Hartree Fock wave-functions. Our calculated energy levels are in excellent agreement with experiments wherever available. Additionally emission rates, wavelengths and oscillator strength are reported for all E1, M1, E2 and M2 transitions among lowest 31 levels. From transition probabilities, lifetimes of lowest 31 levels are derived and compared with experiments. We believe that our extensive ab initio calculations are helpful for plasma physics community to identify the fine structure levels and plasma diagnostics. [1] Del Zanna, G. and Badnell, N. R., 2016 A&A 585 A118. [2] Mattioli, M. et al., 2004 J. Phys. B: At. Mol. Opt. Phys. 37 13. [3] Jönsson, P., Gaigalas, G. et al., 2013 Comput. Phys. Commun. 184 2197.