J/A+A/459/317 Line Frequencies for Uracil (Bruenken+, 2006)
Improved line frequencies for the nucleic acid base uracil for a
radioastronomical search.
Bruenken S., McCarthy M.C., Thaddeus P., Godfrey P.D., Brown R.D.
<Astron. Astrophys. 459, 317 (2006)>
=2006A&A...459..317B 2006A&A...459..317B
ADC_Keywords: Atomic physics ; Spectroscopy
Keywords: ISM: molecules - line: identification - molecular data -
astrochemistry - ISM: lines and bands - radio lines: ISM
Abstract:
We report new laboratory spectroscopic data on the nucleic acid
uracil. The dataset has been extended both into the microwave and
towards mm-wavelengths with the aim to provide accurate transition
rest frequencies for astrophysical searches. The complete experimental
linelist used for the analysis of the data is compiled in Table 2.
Lines marked with an asterisk are taken from Brown et al. (1988,
J. Mol. Struct. 190, 185 and J. Am. Chem. Soc. 110, 2329), all
other lines have been measured in this work.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 53 407 Transitions in uracil (2,4-pyrimidinediol,
molecular formula C4H4N2O2)
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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- 2 I2 --- J' J quantum number upper level
4- 5 I2 --- Ka' Ka quantum number upper level
7- 8 I2 --- Kc' Kc quantum number upper level
10 I1 --- Itot' ? Itot quantum number upper level
12 I1 --- F' ? F quantum number upper level
14 A1 --- --- [-]
16- 17 I2 --- J" J quantum number lower level
19- 20 I2 --- Ka" Ka quantum number lower level
22- 23 I2 --- Kc" Kc quantum number lower level
25 I1 --- Itot" ? Itot quantum number lower level
27 I1 --- F" ? F quantum number lower level
29- 37 F9.3 MHz Freq Transition frequency
39- 43 F5.3 MHz e_Freq Experimental frequency uncertainty
45- 51 F7.4 MHz O-C Difference observed to calculated frequency
53 A1 --- r_Freq [*] Measured by Brown et al. (1988,
J. Mol. Struct. 190, 185 and
J. Am. Chem. Soc. 110, 2329)
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Acknowledgements: S. Bruenken, sbruenken(at)cfa.harvard.edu
(End) Patricia Vannier [CDS] 08-Aug-2006