J/ApJS/162/227 Transition probabilities for SmII (Lawler+, 2006)
Improved laboratory transition probabilities for Sm II and application to the
samarium abundances of the Sun and three r-process-rich, metal-poor stars.
Lawler J.E., Den Hartog E.A., Sneden C., Cowan J.J.
<Astrophys. J. Suppl. Ser., 162, 227-260 (2006)>
=2006ApJS..162..227L 2006ApJS..162..227L
ADC_Keywords: Atomic physics
Keywords: atomic data - stars: abundances - stars: Population II -
Sun: abundances
Abstract:
Radiative lifetimes, accurate to ±5%, have been measured for 212
odd-parity levels of SmII using laser-induced fluorescence. The
lifetimes are combined with branching fractions measured using Fourier
transform spectrometry to determine transition probabilities for more
than 900 lines of SmII. This work is the largest scale laboratory
study to date of SmII transition probabilities using modern methods.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 48 279 Radiative lifetimes of Sm II from laser-induced
fluorescence (LIF) measurements
table2.dat 53 958 Atomic transition probabilities for Sm II
organized by increasing wavelength in air
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.2 cm-1 Eu Upper level energy
10- 12 F3.1 --- Ju Upper level J value
14- 20 F7.2 0.1nm Lambda1 ? LIF Wavelength 1 in air in Angstroms (1)
22- 28 F7.2 0.1nm Lambda2 ? LIF Wavelength 2 in air in Angstroms (1)
30- 34 F5.1 ns tau ? Radiative lifetime from this experiment (2)
36- 41 F6.2 ns tau1 ? Radiative lifetime from other experiment
43- 46 F4.2 ns e_tau1 ? Uncertainty in tau1
48 A1 --- n_tau1 Note and reference about tau1 (3)
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Note (1): Laser-induced fluorescence (LIF) wavelengths
from this experiment only.
Note (2): See note "a" in column n_tau1 for uncertainty.
Note (3): Note on tau1 defined as follows:
a = Uncertainty ±5% on lifetimes from this experiment except for
upper levels 31902.10/cm (±10%) and 32397.48/cm (±7.5%).
b = Biemont et al. (1989A&A...222..307B 1989A&A...222..307B);
c = Scholl et al. (2002, Canadian J. Phys., 80, 1621);
d = Xu et al. (2003, J. Phys. B, 36, 411 ; 2003, J. Phys. B, 36, 4773);
e = Vogel et al. (1988, Phys. Scr., 38, 567).
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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- 8 F8.2 0.1nm Lambda Wavelength in air in Angstroms
10- 17 F8.2 cm-1 Eu Upper level energy
19- 21 F3.1 --- Ju Upper level J value
23- 30 F8.2 cm-1 El Lower level energy
32- 34 F3.1 --- Jl Lower level J value
36- 41 F6.3 10+6/s TransP Transition probability
43- 47 F5.3 10+6/s e_TransP Total uncertainty in TransP
49- 53 F5.2 --- log(gf) Log of degeneracy times oscillator strength
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 31-Aug-2006