J/ApJS/208/18 High-resolution spectrum of La and Ar (Guzelcimen+, 2013)
High-resolution Fourier Transform spectroscopy of lanthanum in Ar
discharge in the near-infrared.
Guzelcimen F., Basar G., Tamanis M., Kruzins A., Ferber R., Windholz L.,
Kroeger S.
<Astrophys. J. Suppl. Ser., 208, 18 (2013)>
=2013ApJS..208...18G 2013ApJS..208...18G
ADC_Keywords: Atomic physics ; Spectra, infrared
Keywords: atomic data - line: identification - miscellaneous
Abstract:
A high-resolution spectrum of lanthanum has been recorded by a Fourier
Transform spectrometer in the wavelength range from 833nm to 1666nm
(6000/cm to 12000/cm) using as light source a hollow cathode lamp
operated with argon as the discharge carrier gas. In total, 2386
spectral lines were detected in this region, of which 555 lines could
be classified as La I transitions and 10 lines as La II transitions.
All La II transitions and 534 of these La I transitions were
classified for the first time, and 6 of the La II transitions and 433
of the classified La I transitions appear to be new lines, which could
not be found in the literature. The corresponding energy level data of
classified lines are given. Additionally, 430 lines are assigned as
Ar I lines and 394 as Ar II lines, of which 179 and 77, respectively,
were classified for the first time. All 77 classified Ar II
transitions as well as 159 of the classified Ar I transitions are new
lines. Furthermore, the wavenumbers of 997 unclassified spectral lines
were determined, 235 of which could be assigned as La lines, because
of their hyperfine pattern. The remaining 762 lines may be either
unclassified Ar lines or unresolved and unclassified La lines with
only one symmetrical peak with an FWHM in the same order of magnitude
as the Ar lines. The accuracy of the wavenumber for the classified
lines with signal-to-noise-ratio higher than four is better than
0.006/cm which corresponds to an accuracy of 0.0004nm at 830nm and
0.0017nm at 1660nm, respectively.
Description:
The spectrum was recorded in the spectral range from 833nm to 1666nm
(6000cm-1 to 12000cm-1) using a high-resolution Bruker IFS 125 HR
Fourier Transform (FT) spectrometer at the Laser Centre of the
University of Latvia. See section 3 for further details.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 105 2386 List of all observed lines (La and Ar) in the
Fourier Transform spectrum from 6000cm-1 to
12000cm-1 (λ=833-1666nm)
table2.dat 105 830 List of classified Ar lines in the Fourier
Transform spectrum from 6000cm-1 to 12000cm-1
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See also:
J/A+A/468/1115 : Thorium and argon lines in the visible (Lovis+, 2007)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 3 I3 10-3cm-1 W [42/995]? Line widths (in "mK"=0.001cm-1)
5- 8 I4 10-3cm-1 DW [-804/899]? Line pattern width
10- 15 I6 --- SNR [2/140000] Signal-to-noise ratio (1)
17- 25 F9.4 nm lamAir [833/1666] Center-of-gravity wavelength λ
in air (1)
27- 35 F9.3 cm-1 sig [6003/11999] Center-of-gravity transition
wavenumber σ in vacuum (1)
37- 42 F6.3 cm-1 Ds [-0.04/0.04]? Difference between wavenumber
and energy of levels
44- 51 A8 --- Ref Reference(s) for already known lines (2)
53- 57 A5 --- Com [B* nc] Comment(s) (3)
59- 71 A13 --- Elem Element (La or Ar) and degree of ionization
73- 83 F11.4 cm-1 Ee ? Energy level of even parity (4)
85- 87 F3.1 --- Je [0/6.5]? J value of level of even parity (4)
89- 99 F11.4 cm-1 Eo ? Energy level of odd parity (4)
101-103 F3.1 --- Jo [0/6.5]? J value of level of odd parity (4)
105 I1 --- npt [0/9]? Number of possible transitions (5)
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Note (1): from Fourier Transform (FT) spectrum.
Note (2): Reference as follows:
nl = new line from this work.
(1) = Zaidel, A. N., Prokofev, V. K., & Raiskii, S. M. 1955, Tables of
Spectral Lines (Berlin: Verlag Technik);
(2) = Harrison G.R. (1969wtwi.book.....H 1969wtwi.book.....H);
(3) = Minnhagen et al. (1973JOSA...63.1185M 1973JOSA...63.1185M);
(4) = Norlen et al. (1973PhyS....8..249N 1973PhyS....8..249N);
(5) = Meggers et al. (1975tsip.book.....M 1975tsip.book.....M);
(6) = Whaling, W., Anderson, W. H. C., Carle, M. T., Brault, J. W., &
Zarem, H. A. 2002, J. Res. Natl. Inst. Stand. Technol., 107, 149;
(7) = Engleman et al. (2003JQSRT..78....1E 2003JQSRT..78....1E);
(8) = Kerber et al. (2008ApJS..178..374K 2008ApJS..178..374K);
(9) = Saloman E.B. (2010JPCRD..39c3101S 2010JPCRD..39c3101S);
(10) = Siddiqui et al. (2013JPhB...46f5002S 2013JPhB...46f5002S).
Note (3): Comment as follows:
nc = new classification;
B = blend;
B* = blend, not listed separately in table 1 but more than one line
in table 2.
Note (4): From Windholz et al. (2003PhST..105...55W 2003PhST..105...55W) in table 1.
From Minnhagen et al. (1973JOSA...63.1185M 1973JOSA...63.1185M); Palmeri & Biemont
(1995PhyS...51...76P 1995PhyS...51...76P); Saloman (2010JPCRD..39c3101S 2010JPCRD..39c3101S) in table 2.
Note (5): Lying in the wavenumber interval of the line width.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 24-Oct-2013