J/A+A/554/A24 Infra-red transitions of Ca and Mg (Civis+, 2013)
Infrared transitions and oscillator strengths of Ca and Mg.
Civis S., Ferus M., Chernov V.E., Zanozina E.M.
<Astron. Astrophys. 554, A24 (2013)>
=2013A&A...554A..24C 2013A&A...554A..24C
ADC_Keywords: Atomic physics ; Spectra, infrared
Keywords: atomic data - methods: laboratory - techniques: spectroscopic
Abstract:
While solar spectra contain a lot of CaI and MgI infrared lines, no
laboratory-measured spectra of these atoms have been reported for
wavenumbers below 2000cm-1. This study reports CaI spectra in
1300-4500cm-1 range and MgI spectra in 1300-4500cm-1 range.
We perform the time-resolved Fourier transform infrared spectroscopy
study of a plasma created by the laser ablation of MgF2 and CaF2
targets in a vacuum. The oscillator strengths(f-values) are calculated
using quantum defect theory (QDT) which shows good agreement with the
available experimental and theoretical results.
We report several CaI and MgI IR lines which have not been measured
previously in laboratory. The recorded spectra allow to determine the
excitation energies of some Ca I and Mg I states with high orbital
momentum (l=4,5). We also provide a large list of QDT-calculated
f-values for CaI and MgI in the range of 800-9000cm-1.
Description:
In tables we present the QDT calculated the matrix elements (f- and
A-values) for the transition involving the nd, nf, ng, and nh states
of CaI and MgI in the 800-9000cm-1 range. The Ritz wavenumbers ν
and air wavelengths λ are calculated using the energy level
values from the cited references.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 92 183 QD-calculated oscillator strengths for CaI
table6.dat 102 201 QD-calculated oscillator strengths for MgI
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See also:
J/A+A/389/716 : Oscillator strengths for Li-like ions (Nahar, 2002)
J/A+A/444/305 : A-values + oscillator strength of Ca XIII (Landi+, 2005)
J/A+A/548/A27 : Oscillator and collision strengths for MgVI (Tayal+, 2012)
Byte-by-byte Description of file: table5.dat table6.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Trans The transition i ← k
23- 31 F9.3 cm-1 Elow Lower level energy
34 A1 --- --- [[]
35 I1 --- r_Elow [1/4] Citation of lower level energy (1)
36 A1 --- --- []]
39- 47 F9.3 cm-1 Eup Upper level energy
50 A1 --- --- [[]
51 I1 --- r_Eup [1/4] Citation of upper level energy (1)
52 A1 --- --- []]
55- 62 F8.3 cm-1 nu [808/8888] Wavenumber of transition ν (2)
65- 72 F8.2 nm lambda Air wavelength λ of transition (2)
75- 82 E8.2 s-1 Aki Transition probability (A-value)
85- 92 E8.2 --- fik Oscillator strength (f-value)
95-102 E8.2 --- NIST-fik ? Oscillator strength (f-value) from NIST
[for MgI only]
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Note (1): References as follows:
1 = Chang et al., Physics Essays, vol. 13, issue 2, p. 198 (2000),
2000PhyEs..13..198C 2000PhyEs..13..198C
2 = Sugar & Corliss, Washington: American Chemical Society (1985),
1985aeli.book.....S 1985aeli.book.....S
3 = Reader et al., Atomic Spectroscopic Databases at NIST,
2011nlaw.confC..10R
4 = Martin & Zalubas, Journal of Physical and Chemical Reference Data,
V.9, Is. 1, pp.1-58, 1980JPCRD...9....1M 1980JPCRD...9....1M
Note (2): The Ritz wavenumbers ν and air wavelengths λ are
calculated using the energy level values from the cited references.
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Acknowledgements:
Svatopluk Civis, civis(at)jh-inst.cas.cz
(End) Zanozina Ekaterina [UFCH AV CR], Patricia Vannier [CDS] 04-Apr-2013