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 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