J/ApJS/227/16 Energy levels & transition rates for F-like ions (Si+, 2016)
Extended calculations with spectroscopic accuracy: energy levels and transition
properties for the fluorine-like isoelectronic sequence with z=24-30.
Si R., Li S., Guo X.L., Chen Z.B., Brage T., Jonsson P., Wang K., Yan J.,
Chen C.Y., Zou Y.M.
<Astrophys. J. Suppl. Ser., 227, 16-16 (2016)>
=2016ApJS..227...16S 2016ApJS..227...16S (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data; atomic processes
Abstract:
We have performed extensive multiconfiguration Dirac-Hartree-Fock
calculations and second-order many-body perturbation calculations for
F-like ions with Z=24-30. Energy levels and transition rates for
electric dipole (E1), electric-quadrupole (E2), electric-octupole
(E3), magnetic dipole (M1), and magnetic-quadrupole (M2) transitions,
as well as radiative lifetimes, are provided for the lowest 200 levels
belonging to the 1s22s22p5, 1s22s2p6, 1s22s22p43l,
1s22s2p53l, 1s22p63l, and 1s22s22p44l configurations of
each ion. The results from the two sets of calculations are in
excellent agreement. Extensive comparisons are also made with other
theoretical results and observed data from the CHIANTI and NIST
databases. The present energies and wavelengths are believed to be
accurate enough to aid line identifications involving the n=3 and n=4
configurations, for which observations are largely missing. The
calculated wavelengths and transition data will be useful in the
modeling and diagnostics of astrophysical and fusion plasmas.
Description:
For the multiconfiguration Dirac-Hartree-Fock (MCDHF) calculation we
use the latest version of the GRASP2K code (Jonsson+ 2013CoPhC.184.2197J 2013CoPhC.184.2197J),
while the many-body perturbation theory (MBPT) calculation is
performed using the Flexible Atomic Code (FAC; Gu 2008CaJPh..86..675G 2008CaJPh..86..675G).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 127 1400 Energy levels relative to the ground state and
lifetimes for the lowest 200 levels of F-like
ions with Z=24-30
table5.dat 107 6620 Wavelengths, transition rates, oscillator
strengths, and line strengths for transitions
among the lowest 200 levels in F-like ions
with Z=24-30
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See also:
J/A+A/592/A141 : Helium-like ions with Z=10-36 transition rates (Si+, 2016)
J/ApJS/223/3 : Radiative transition from ArXII to ZnXXIV (Wang+, 2016)
J/ApJS/218/16 : Energy levels + transition rates of Be-like ions (Wang+, 2015)
J/ApJS/215/26 : Energy levels & transition rates of C-like ions (Wang+, 2014)
J/A+A/459/307 : Fe XVIII Benchmarking atomic data (Del Zanna+, 2006)
J/A+A/457/721 : IRON Project. LXII. Fe XVIII transitions (Nahar, 2006)
J/ApJS/156/105 : Transitions in L-shell ions of Fe and Ni (Gu+, 2005)
J/A+A/416/383 : Transition probabilities for Fe XVIII (Jonauskas+, 2004)
J/A+AS/125/149 : CHIANTI: An Atomic Database For Emission Lines I. (Dere+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Z [24/30] Atomic number
6- 8 I3 --- Key [1/200] Key number
11- 30 A20 --- Config Configuration
33- 42 A10 --- LSJ LSJ Term
45- 52 I8 cm-1 E-NIST [0/12941000]? Energy levels, NIST (1)
55- 62 I8 cm-1 E-MCDHF [70920/12989869]?=0 Energy levels,
multiconfiguration Dirac-Hartree-Fock
(MCDHF) calculation
65- 72 I8 cm-1 E-MBPT [70988/12987289]?=0 Energy levels,
many-body perturbation theory
(MBPT) calculation
75- 82 E8.2 s LT-MCDHF [0/0.00016]? Lifetimes, MCDHF calculation
85- 92 E8.2 s LT-MBPT [0/0.00016]? Lifetimes, MBPT calculation
97-127 A31 --- Comp LSJ compositions
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Note (1): From the NIST atomic spectra database (Kramida+ 2016APS..DMP.Q1202K).
The NIST identification of 2s22p4(1S)4d 2D1/2 for ZnXXII is
a misprint (Sugar & Musgrove 1995JPCRD..24.1803S 1995JPCRD..24.1803S), and is replaced by
2s22p4(1S)4d 2D3/2.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Z [24/30] Atomic number
6- 8 I3 --- j [2/200] Upper level
11- 13 I3 --- i [1/184] Lower level
16- 17 A2 --- Type Transition type: electric dipole (E1),
electric-quadrupole (E2) or magnetic dipole (M1)
20- 29 E10.4 0.1nm lam-MCDHF [7.7/1410] Wavelengths, MCDHF calculation,
in Angstroms
32- 41 E10.4 0.1nm lam-MBPT [7.7/1409] Wavelengths, MBPT calculation,
in Angstroms
44- 52 E9.3 s-1 A-MCDHF [6395/4.5e+13] Transition rates,
MCDHF calculation
55- 63 E9.3 --- gf-MCDHF [3.8e-6/8] Oscillator strengths,
MCDHF calculation
66- 74 E9.3 --- S-MCDHF [3.3e-7/1.7] Line strengths (in au),
MCDHF calculation
77- 85 E9.3 s-1 A-MBPT [6370/4.4e+13] Transition rates, MBPT calculation
88- 96 E9.3 --- gf-MBPT [3.7e-6/7.9] Oscillator strengths,
MBPT calculation
99-107 E9.3 --- S-MBPT [1.6e-7/1.7] Line strengths (in au),
MBPT calculation
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 09-Jan-2017