J/A+A/623/A155 SII, ClII, ArIV energy levels & transition data (Rynkun+, 2019)
Theoretical investigation of energy levels and transition data for S II,
Cl III, Ar IV.
Rynkun P., Gaigalas G., Joensson P.
<Astron. Astrophys. 623, A155 (2019)>
=2019A&A...623A.155R 2019A&A...623A.155R (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data
Abstract:
The aim of this work is to present accurate and extensive results of
energy spectra and transition data for the SII, ClIII, and ArIV ions.
These data are useful for understanding and probing physical processes
and conditions in various types of astrophysical plasmas.
The multiconfiguration Dirac-Hartree-Fock (MCDHF) and relativistic
configuration interaction (RCI) methods, which are implemented in the
general-purpose relativistic atomic structure package GRASP2K, are
used in the present work. In the RCI calculations the
transverse-photon (Breit) interaction, the vacuum polarization, and
the self-energy corrections are included.
Energy spectra are presented comprising the 134, 87, and 103 lowest
states in SII, ClIII, and ArIV, respectively. Energy levels are in
very good agreement with NIST database recommended values and
associated with smaller uncertainties than energies from other
theoretical computations. Electric dipole (E1), magnetic dipole (M1),
and electric quadrupole (E2) transition data are computed between the
above states together with the corresponding lifetimes. Based on
internal validation, transition rates for the majority of the stronger
transitions are estimated to have uncertainties of less than 3%.
Description:
Table 5, 6, and 7 presents electric dipole (E1), magnetic dipole
(M1), and electric quadrupole (E2) transition data between the states
of the calculated energy levels, respectively for the SII, ClIII,
and ArIV ions. In the Tables transition data as wavelengths, weighted
oscillator strengths, transition rates of E1, M1, E2 transitions and
the accuracy indicator dT are given.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 119 1433 Transition data of E1, M1, E2 transitions
for the SII ion
table6.dat 119 876 Transition data of E1, M1, E2 transitions
for the ClIII ion
table7.dat 119 1363 Transition data of E1, M1, E2 transitions
for the ArIV ion
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See also:
J/A+A/557/A136 : Oxygen-like ions Energies and transition rates (Rynkun+, 2013)
J/ApJS/235/27 : Energy levels + transition rates for P-like ions (Wang+, 2018)
Byte-by-byte Description of file: table5.dat table6.dat table7.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ju J of upper level
6 A1 --- pu [-+] Parity of upper level
8- 30 A23 --- ustate Label of upper level
32- 35 A4 --- Jl J of lower level
37 A1 --- pl [-+] Parity of lower level
39- 61 A23 --- lstate Label of lower level
65- 66 A2 --- EM Type of the transition
69- 74 I6 cm-1 deltaE Transition energy
76- 84 F9.2 0.1nm lambda Wavelength of transition
89- 97 E9.4 s-1 A Radiative transition probability in the
length gauge (for E1 and E2)
102-110 E9.4 --- gf Weighted oscillator strength in the
length gauge (for E1 and E2)
115-119 F5.3 --- dT ? Accuracy indicator, characterizing the
uncertainty of the computed transition rates
for E1 and E2 defined by Eq.(5) in the paper
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Acknowledgements:
Pavel Rynkun, pavel.rynkun(at)gmail.com
(End) Pavel Rynkun [VU], Patricia Vannier [CDS] 31-Jan-2019