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J/A+A/597/A76       Mg-like ions energy levels               (Gustafsson+, 2017)

MCDHF and RCI calculations of energy levels, lifetimes and transition rates for 3l3l', 3l4l' and 3s5l states in Ca IX. As XXII and Kr XXV. Gustafsson S., Jonsson P., Froese Fischer C., Grant I.P. <Astron. Astrophys. 597, A76 (2017)> =2017A&A...597A..76G (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics Keywords: atomic data - methods: numerical - line: identification Abstract: Multiconfiguration Dirac-Hartree-Fock (MCDHF) calculations and relativistic configuration interaction (RCI) calculations were performed for states of the 3l3l', 3l4l' and 3s5l configurations in the Mg-like ions Ca IX - As XXII and Kr XXV. Valence and core-valence electron correlation effects are accounted for through large configuration state function expansions. Calculated excitation energies are in very good agreement with observations for the lowest levels. For higher lying levels observations are often missing and present energies aid line identification in spectra. Lifetimes and transition data are given for all ions. There is an excellent agreement for both lifetimes and transition data with recent multiconfiguration Hartree-Fock Breit Pauli calculations. Description: MCDHF and subsequent RCI calculations were performed for states of the 3l3l', 3l4l' and 3s5l configurations in the Mg-like ions Ca IX - As XXII and Kr XXV and excitation energies, lifetimes, and transition data are presented for all ions. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 64 2248 Comparison of calculated and observed excitation energies table4.dat 58 2270 Lifetimes table6.dat 134 46015 Transition data
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Ion Ion 14 A1 --- J J quantum number 16 A1 --- P [±] Parity 18- 29 A12 --- State Quantum label of the state 30 A1 --- n_State [ab] Note on State (G1) 35- 41 I7 cm-1 E(RCI) Excitation energy from RCI calc. this work 48- 54 I7 cm-1 E(obs) ? Observed excitation energy (1) 58- 64 I7 cm-1 DeltaE ? Difference between observed and RCI energies
Note (1): From Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2015). NIST Atomic Spectra Database (Version. 5.3), available: http://physics.nist.gov/asd [2016, November 22]. National Institute of Standards and Technology, Gaithersburg, MD.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Ion Ion 14 A1 --- J J quantum number 16 A1 --- P [±] Parity 18- 29 A12 --- State Quantum label of the state 30 A1 --- n_State [ab] Note on State (G1) 35- 44 E10.6 s Tl Lifetime calculated in length form 49- 58 E10.6 --- dT Accuracy indicator dT (1)
Note (1): dT = |Tl-Tv|/max(Tl,Tv), T_l and T_v lifetimes computed in length and velocity form, respectively.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Ion Ion 14 A1 --- Ju J quantum number upper state 16 A1 --- Pu [±] Parity upper state 18- 29 A12 --- ustate Quantum label of the upper state 30 A1 --- n_ustate [ab] Note on Stateu (G1) 38 A1 --- Jl J quantum number lower state 40 A1 --- Pl [±] Parity lower state 42- 53 A12 --- lstate Quantum label of the lower state 54 A1 --- n_lstate [ab] Note on Statel (G1) 58- 59 A2 --- EM Electromagnetic multipole 67- 73 I7 cm-1 DeltaE Transition energy 87- 95 F9.3 0.1nm lambda Wavelength (in Å) 100-108 E9.4 s-1 A Transition rate in length form 113-121 E9.4 --- gf Weighted oscillator strength 130-134 F5.3 --- dA ? Accuracy indicator dA (1)
Note (1): dA = |Al-Av|/max(Al,Av), A_l and A_v transition rates computed in length and velocity form, respectively.
Global notes: Note (G1): When two different energies within a configuration have the the same LS notation the label 'a' is used for the lower and 'b' for the higher energy.
Acknowledgements: Stefan Gustafsson, stefan.gustafsson(at)mah.se
(End) Patricia Vannier [CDS] 23-Nov-2016
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