J/A+A/678/A67 Nb I-IV and Ag I-IV oscillator strengths (Ben Nasr+, 2023)
Atomic data and expansion opacity calculations in two representative 4d
transition elements, niobium and silver, of interest for kilonovae studies.
Ben Nasr S., Carvajal Gallego H., Deprince J., Palmeri P., Quinet P.
<Astron. Astrophys. 678, A67 (2023)>
=2023A&A...678A..67B 2023A&A...678A..67B (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: Atomic data ; Atomic processes ; Opacity
Abstract:
Neutron star (NS) mergers are thought to be a source of heavy
trans-iron element production. The latter can be detected in the
spectra of the ejected materials, from which bright electromagnetic
radiation is emitted. This latter is due to the radioactive decay of
the produced heavy r-process nuclei and is known as kilonova. Because
of their complex atomic structures - characterized by configurations
involving unfilled nd or nf subshells - the heavy elements of the
kilonova ejecta often give rise to numerous absorption lines
generating significant opacities. The determination of the latter,
which are of paramount importance for the analysis of kilonova light
curves, requires knowledge of the radiative parameters of the spectral
lines belonging to the ions expected to be present in the kilonova
ejecta. The aim of the present work is to provide new atomic opacity
data for two representative 4d elements, niobium (Nb) and silver (Ag),
in their first four charge states, namely for Nb I-IV and Ag I-IV.
Large-scale calculations based on the pseudo-relativistic Hartree-Fock
(HFR) method were performed to obtain the atomic structure and
radiative parameters while the expansion formalism was used to
estimate the opacities.
Wavelengths and oscillator strengths were computed for several million
spectral lines in Nb I-IV and Ag I-IV ions. The reliability of these
parameters was estimated by comparison with the few previously
published experimental and theoretical results. The newly obtained
atomic data were then used to calculate expansion opacities for
typical kilonova conditions expected one day after NS merger, a
density of ρ=10-13g/cm3, and temperatures ranging from T=5000K
to T=15000K.
Description:
Pseudo-relativistic Hartree-Fock (HFR) oscillator strengths for
experimentally observed radiative transitions in Nb I-IV and Ag I-IV
ions and comparison with previously published data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 68 76 Oscillator strengths (log gf) for
experimentally observed lines in Nb I
table4.dat 74 67 Oscillator strengths (log gf) for
experimentally observed lines in Nb II
table5.dat 68 53 Oscillator strengths (log gf) for
experimentally observed lines in Nb III
table6.dat 68 96 Oscillator strengths (log gf) for
experimentally observed lines in Nb IV
table7.dat 80 24 Oscillator strengths (log gf) for
experimentally observed lines in Ag I
table8.dat 74 85 Oscillator strengths (log gf) for
experimentally observed lines in Ag II
table9.dat 74 109 Oscillator strengths (log gf) for
experimentally observed lines in Ag III
table10.dat 68 494 Oscillator strengths (log gf) for
experimentally observed lines in Ag IV
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Lev(even) Even level
19- 35 A17 --- Lev(odd) Odd level
38- 46 F9.3 0.1nm Lambda(HFR) HFR wavelength (1)
48- 56 F9.3 0.1nm Lambda(EXP) Experimental wavelength (2)
58- 62 F5.2 --- loggf(HFR) Weighted oscillator strength (1)
64- 68 F5.2 --- loggf(prev) Weighted oscillator strength (2)
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Note (1): Computed in the present work
Note (2): From Gao et al., 2019ApJS..242...23G 2019ApJS..242...23G
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Lev(even) Even level
19- 35 A17 --- Lev(odd) Odd level
38- 46 F9.3 0.1nm Lambda(HFR) HFR wavelength (1)
48- 56 F9.3 0.1nm Lambda(EXP) Experimental wavelength (2)
58- 62 F5.2 --- loggf(HFR) Weighted oscillator strength (1)
64- 68 F5.2 --- loggf(prev)1 Weighted oscillator strength (2)
70- 74 F5.2 --- loggf(prev)2 Weighted oscillator strength (3)
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Note (1): Computed in the present work
Note (2): From Nilsson et al., 2010A&A...511A..16N 2010A&A...511A..16N
Note (3): From Ruczkowski et al., JQSRT, 155, 1 (2015)
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 17 A17 --- Lev(even) Even level
19- 35 A17 --- Lev(odd) Odd level
38- 46 F9.3 0.1nm Lambda(HFR) HFR wavelength (1)
48- 56 F9.3 0.1nm Lambda(EXP) Experimental wavelength (2)
58- 62 F5.2 --- loggf(HFR) Weighted oscillator strength (1)
64- 68 F5.2 --- loggf(prev) Weighted oscillator strength (2)
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Note (1): Computed in the present work
Note (2): From Nilsson et al., 2010A&A...511A..16N 2010A&A...511A..16N
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Lev(even) Even level
19- 35 A17 --- Lev(odd) Odd level
38- 46 F9.3 0.1nm Lambda(HFR) HFR wavelength (1)
48- 56 F9.3 0.1nm Lambda(EXP) Experimental wavelength (2)
58- 62 F5.2 --- loggf(HFR) Weighted oscillator strength (1)
64- 68 F5.2 --- loggf(prev) Weighted oscillator strength (2)
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Note (1): Computed in the present work
Note (2): From Kramida et al., NIST [https://physics.nist.gov/asd] (2023)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Lev(even) Even level
19- 35 A17 --- Lev(odd) Odd level
38- 46 F9.3 0.1nm Lambda(HFR) HFR wavelength (1)
48- 56 F9.3 0.1nm Lambda(EXP) Experimental wavelength (2)
58- 62 F5.2 --- loggf(HFR) Weighted oscillator strength (1)
64- 68 F5.2 --- loggf(prev)1 Weighted oscillator strength (2)
70- 74 F5.2 --- loggf(prev)2 ? Weighted oscillator strength (3)
76- 80 F5.2 --- loggf(prev)3 ? Weighted oscillator strength (4)
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Note (1): Computed in the present work
Note (2): From Pickering et al., EPJD, 181, 13 (2001)
Note (3): From Glowacki et al., Phys. Rev A, 80, 042505 (2009)
Note (4): From Kramida et al., NIST [https://physics.nist.gov/asd] (2023)
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Lev(even) Even level
19- 35 A17 --- Lev(odd) Odd level
38- 46 F9.3 0.1nm Lambda(HFR) HFR wavelength (1)
48- 56 F9.3 0.1nm Lambda(EXP) Experimental wavelength (2)
58- 62 F5.2 --- loggf(HFR) Weighted oscillator strength (1)
64- 68 F5.2 --- loggf(prev)1 ? Weighted oscillator strength (2)
70- 74 F5.2 --- loggf(prev)2 ? Weighted oscillator strength (3)
--------------------------------------------------------------------------------
Note (1): Computed in the present work
Note (2): From Kramida et al., NIST [https://physics.nist.gov/asd] (2023)
Note (3): From Ruczkowski et al., 2016MNRAS.459.3768R 2016MNRAS.459.3768R
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Lev(even) Even level
19- 35 A17 --- Lev(odd) Odd level
38- 46 F9.3 0.1nm Lambda(HFR) HFR wavelength (1)
48- 56 F9.3 0.1nm Lambda(EXP) Experimental wavelength (2)
58- 62 F5.2 --- loggf(HFR) Weighted oscillator strength (1)
64- 68 F5.2 --- loggf(prev)1 ? Weighted oscillator strength (2)
70- 74 F5.2 --- loggf(prev)2 ? Weighted oscillator strength (3)
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Note (1): Computed in the present work
Note (2): From Ankita & Tauheed, JQSRT, 05, 022 (2018)
Note (3): From Zhang et al., Phys. Scr., 88, 065302 (2013)
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Lev(even) Even level
19- 35 A17 --- Lev(odd) Odd level
38- 46 F9.3 0.1nm Lambda(HFR) HFR wavelength (1)
48- 56 F9.3 0.1nm Lambda(EXP) Experimental wavelength (2)
58- 62 F5.2 --- loggf(HFR) Weighted oscillator strength (1)
64- 68 F5.2 --- loggf(prev) ? Weighted oscillator strength (2)
--------------------------------------------------------------------------------
Note (1): Computed in the present work
Note (2): From Ankita & Tauheed, JQSRT, 254, 107193
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Acknowledgements:
Pascal Quinet, Pascal.QUINET(at)umons.ac.be
(End) Pascal Quinet [Univ. of Mons, Belgium], Patricia Vannier [CDS] 28-Sep-2023