J/ApJS/202/15 UV spectrum of CrII (Sansonetti+, 2012)
Comprehensive observations of the ultraviolet spectrum and improved energy
levels for singly ionized chromium (Cr II).
Sansonetti C.J., Nave G., Reader J., Kerber F.
<Astrophys. J. Suppl. Ser., 202, 15 (2012)>
=2012ApJS..202...15S 2012ApJS..202...15S
ADC_Keywords: Atomic physics ; Line Profiles ; Spectra, ultraviolet
Keywords: atomic data - line: identification - methods: laboratory -
techniques: spectroscopic - ultraviolet: general
Abstract:
We report new observations of the spectrum of singly ionized chromium
(CrII) in the region 1142-3954Å. The spectra were recorded with the
National Institute of Standards and Technology 10.7m normal-incidence
vacuum spectrograph and FT700 vacuum ultraviolet Fourier transform
spectrometer. More than 3600 lines are classified as transitions among
283 even and 368 odd levels. The new spectral data are used to
re-optimize the energy levels, reducing their uncertainties by a
typical factor of 20.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 651 Optimized energy levels of Cr II
table2.dat 137 3600 Classified lines of Cr II
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See also:
J/ApJS/196/24 : Electron-impact excitation of CrII (Wasson+, 2011)
J/A+A/511/A68 : Transitions of CrII (Gurell+, 2010)
J/A+A/524/A35 : Effective collision strengths of CrII (Wasson+, 2010)
J/ApJ/700/720 : The 236.6-5400.0nm spectrum of CrI (Wallace+, 2009)
J/ApJ/667/1267 : CrI transition probabilities (Sobeck+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Conf Configuration
24- 28 A5 --- Term Term
31- 32 I2 --- 2J [1/17] J value
33- 34 A2 --- --- [/2]
37- 47 F11.4 cm-1 E Energy level value
50- 55 F6.4 cm-1 e_E Uncertainty in Energy
58- 59 I2 --- Nl Number of lines observed for level
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Int Intensity
7- 9 A3 --- Comm Codes describing line character (1)
11- 20 F10.5 0.1nm lambda Wavelength λ in Angstroms (2)
23- 29 F7.5 0.1nm e_lambda Uncertainty in lambda
33- 42 F10.4 cm-1 sigma Wavenumber σ
45- 50 F6.4 cm-1 e_sigma Uncertainty in sigma
55- 68 A14 --- Conf.0 Even level configuration
70- 73 A4 --- Term.0 Even level term
76- 77 I2 --- 2J0 [1/17] Even level J value
78- 79 A2 --- --- [/2]
81 A1 --- --- [-] Dash to visually offset even/odd sides
83-103 A21 --- Conf.1 Odd level configuration
105-109 A5 --- Term.1 Odd level term
112-113 I2 --- 2J1 [1/17] Odd J value
114-115 A2 --- --- [/2]
119-128 F10.5 0.1nm lam.c Calculated wavelength (2)
131-137 F7.5 0.1nm e_lam.c Uncertainty in CWave
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Note (1): Code as follows:
a = Asymmetric
c = Complex
h = blend on high side
l = blend on low side
p = perturbed by close line
w = wide
x = extrapolated wavelength
# = omitted from level optimization
* = multiply classified
Note (2):
Vacuum wavelength for λ<2000Å;
standard air wavelength for λ>2000Å
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 18-Oct-2012