J/ApJS/228/16 Spectra of a Holmium in the near-UV. I. Ho I. (Al-Labady+, 2017)
Line identification of atomic and ionic spectra of Holmium in the near-UV.
Part I. Spectrum of Ho I.
Al-Labady N., Ozdalgic B., Er A., Guzelcimen F., Ozturk I.K., Kroger S.,
Kruzins A., Tamanis M., Ferber R., Basar G.
<Astrophys. J. Suppl. Ser., 228, 16-16 (2017)>
=2017ApJS..228...16A 2017ApJS..228...16A (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics ; Spectra, ultraviolet
Keywords: atomic data; line: identification; methods: laboratory: atomic;
techniques: spectroscopic
Abstract:
The Fourier Transform spectra of a Holmium hollow cathode discharge
lamp have been investigated in the UV spectral range from 25000 up to
31530cm-1 (317 to 400nm). Two Ho spectra have been measured with
neon and argon as buffer gases. Based on the intensity ratios from
these two spectra, a distinction was made between atomic and ionic
lines (ionic lines are discussed in an accompanying paper). Using the
known Ho I energy levels, 71 lines could be classified as transitions
of atomic Ho, 34 of which have not been published previously. Another
32 lines, which could not be classified, are listed in the literature
and assigned as atomic Ho. An additional 370 spectral lines have been
assigned to atomic Ho based on the signal-to-noise ratio in the two
spectra measured under different discharge conditions, namely with
buffer gases argon and neon, respectively. These 370 lines have not
been previously listed in the literature.
Description:
The high-resolution spectra of Holmium (Ho) were recorded with a
Fourier Transform spectrometer IFS125 HR at the Laser Centre of the
University of Latvia in Riga.
Two Ho spectra were recorded, one with argon (Ar) as a buffer gas and
one with neon (Ne). The spectra cover the ultraviolet spectral range
from 25000 up to 31530cm-1, or 317 to 400nm, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 86 473 List of Ho I lines in the FT spectra from 25000cm-1
to 31530 cm-1 (classified as well as unclassified
but unambiguously assigned to Ho I)
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See also:
VI/74 : Atomic Energy Level Data (NIST 1993)
J/ApJS/228/17 : Spectra of a Holmium in the near-UV. II. (Basar+, 2017)
J/ApJS/182/51 : Transition probabilities of rare earth elements (Lawler+, 2009)
http://www.nist.gov/pml/atomic-spectra-database/ : NIST atomic spectra database
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 F8.4 nm lamAir [317/400] Center-of-gravity wavelength in air (1)
10- 17 F8.2 cm-1 sig [24995.5/31529.4] Center-of-gravity transition
wavenumber in vacuum (1)
19- 22 I4 --- SNR-Ar [2/1770] Signal-to-noise ratio from FT spectrum
with Ar
24- 27 I4 --- SNR-Ne [2/1165] Signal-to-noise ratio from FT spectrum
with Ne
29- 32 F4.2 --- R [0.6/2.7] Relation between S/N in Ho-Ar & in
Ho-Ne spectrum
34- 40 A7 --- Comm Comments (2)
42- 45 I4 10-3cm-1 W [100/1760] Line widths; in milli-Kayser
47 A1 --- Ind Indicator of hyperfine structure (3)
49- 53 I5 10-3cm-1 DW [-1646/1339]? Total separation of the strong
hyperfine components in milli-Kayser (4)
55- 59 F5.2 cm-1 Ds [-0.3/0.3]? Difference between the wavenumber in
vacuum and the energy difference of the levels
61- 68 F8.2 cm-1 El [0/15130.4]? Level energy of lower level
70- 73 F4.1 --- Jl [4.5/10.5]? J quantum number of lower level
75- 82 F8.2 cm-1 Eu [25272.6/43278.6]? Level energy of upper level
84- 86 F3.1 --- Ju [3.5/9.5]? J value of upper level
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Note (1): From the FT spectrum.
Note (2): Comment as follows:
nl = new line;
nc = line known, but newly classified;
b = blend;
ex = line excluded from averaging of R values.
Note (3): Indicator as follows:
+ = clear fingerprint with increasing intensities;
- = clear fingerprint with decreasing intensities;
* = no clear increase or decrease visible.
Note (4): Total separation of the strong hyperfine components (1mK=0.001cm-1),
negative if the highest hyperfine component lies at smaller frequencies.
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History:
From electronic version of the journal
References:
Basar et al. Part II. 2017ApJS..228...17B 2017ApJS..228...17B Cat. J/ApJS/228/17
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 12-Apr-2017