J/ApJ/825/150 Laboratory spectroscopy of sodium chloride (NaCl) (Cabezas+, 2016)
High-resolution rotational spectrum, Dunham coefficients, and
potential energy function of NaCl.
Cabezas C., Cernicharo J., Quintana-Lacaci G., Pena I., Agundez M.,
Velilla Prieto L., Castro-Carrizo A., Zuniga J., Bastida A., Alonso J.L.,
Requena A.
<Astrophys. J., 825, 150-150 (2016)>
=2016ApJ...825..150C 2016ApJ...825..150C (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: astrochemistry; molecular data; molecular processes;
radiative transfer; stars: AGB and post-AGB
Abstract:
We report laboratory spectroscopy for the first time of the J=1-0 and
J=2-1 lines of Na35Cl and Na37Cl in several vibrational states.
The hyperfine structure has been resolved in both transitions for all
vibrational levels, which permit us to predict with high accuracy the
hyperfine splitting of the rotational transitions of the two
isotopologues at higher frequencies. The new data have been merged
with all previous works at microwave, millimeter, and infrared
wavelengths and fitted to a series of mass-independent Dunham
parameters and to a potential energy function. The obtained parameters
have been used to compute a new dipole moment function, from which the
dipole moment for infrared transitions up to Δv=8 has been
derived. Frequency and intensity predictions are provided for all
rovibrational transitions up to J=150 and v=8, from which the ALMA
data of evolved stars can be modeled and interpreted.
Description:
The rotational spectrum of sodium chloride (NaCl) has been obtained
using two different Fourier transform microwave (FTMW) spectrometers
constructed at the University of Valladolid. See section 2.1 for
further explanations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 41 223 Measured frequencies and residuals for the nuclear
quadrupole coupling hyperfine components of
rotational transitions for Na35Cl
table2.dat 41 166 Measured frequencies and residuals for the nuclear
quadrupole coupling hyperfine components of
rotational transitions for Na37Cl
table7.dat 63 16281 Predicted frequencies and intensities for Na35Cl
table8.dat 63 16281 Predicted frequencies and intensities for Na37Cl
table10.dat 42 155 Comparison between observed and calculated
frequencies (in MHz) of rotational transitions
of Na35Cl
table11.dat 42 76 Comparison between observed and calculated
frequencies (in MHz) of rotational transitions
of Na37Cl
table12.dat 37 1337 Comparison between observed and calculated
frequencies (in cm-1) of vibrational-rotational
transitions of Na35Cl
table13.dat 37 501 Comparison between observed and calculated
frequencies (in cm-1) of vibrational-rotational
transitions of Na37Cl
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See also:
J/A+A/592/A76 : VY CMa ALMA NaCl images (Decin+, 2016)
J/MNRAS/442/1821 : ExoMol line list for KCl (Barton+, 2014)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1 I1 --- V [0/6] Vibrational state
3 I1 --- J1 [1/2] Upper J level
5 I1 --- J0 [0/1] Lower J level
7- 9 F3.1 --- F1u [0.5/3.5] Upper F1 level
11- 13 F3.1 --- F1l [0.5/2.5] Lower F1 level
15 I1 --- Fu [0/5] Upper F level
17 I1 --- Fl [0/4] Lower F level
19- 29 F11.5 MHz nu [12374.4/26055.3] Observed frequency
31- 41 F11.8 MHz O-C [-0.005/0.004] Difference observed-calculated
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Byte-by-byte Description of file: table[78].dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- J1 [0/201] Upper J level
5- 7 I3 --- J0 [0/201] Lower J level
9 I1 --- V1 [0/8] Upper vibrational level
11 I1 --- V0 [0/8] Lower vibrational level
13- 25 F13.5 --- nuCalc Calculated frequency
27- 35 F9.6 --- e_nuCalc Uncertainty in nuCalc
37- 45 A9 --- x_nuCalc Units of nuCalc (MHz or cm-1)
47- 54 F8.2 K Eup [0.6/15247] Energy of the upper level
56- 63 E8.2 s-1 Aij [0/6.5] Einstein Coefficient A
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Byte-by-byte Description of file: table1[01].dat
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Bytes Format Units Label Explanations
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1 I1 --- V [0/6] Vibrational state
3- 4 I2 --- J1 [1/76] Upper J level
6- 7 I2 --- J0 [0/75] Lower J level
9- 20 F12.5 MHz nu [12376/931969] Observed frequency
22- 32 F11.4 MHz nuCalc [12376/931969] Calculated frequency
34- 40 F7.4 MHz O-C [-0.3/0.2] Difference, observed-calculated
42 I1 --- Ref Reference (1)
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Note (1): References as follows:
1 = This work;
2 = Clouser & Gordy (1964PhRv..134R.863C 1964PhRv..134R.863C);
3 = Caris et al. (2002ZNatA..57..663C 2002ZNatA..57..663C).
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Byte-by-byte Description of file: table1[23].dat
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Bytes Format Units Label Explanations
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1 I1 --- V1 [1/8]? Upper vibrational state
2 A1 --- --- [-]
3 I1 --- V0 [0/7]? Lower vibrational state
5- 7 I3 --- J1 [0/118]? Upper J level
8 A1 --- --- [-]
9- 11 I3 --- J0 [0/117]? Lower J level
13- 20 F8.4 cm-1 nu [335.1/388]? Observed frequency
22- 29 F8.4 cm-1 nuCalc [313.7/388]? Calculated frequency
31- 37 F7.4 cm-1 O-C [-0.02/0.02]? Difference, observed-calculated
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 02-Sep-2016