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J/ApJS/233/15             ND2 rotational spectrum             (Melosso+, 2017)

Terahertz spectroscopy and global analysis of the rotational spectrum of doubly deuterated amidogen radical ND2. Melosso M., Degli Esposti C., Dore L. <Astrophys. J. Suppl. Ser., 233, 15 (2017)> =2017ApJS..233...15M
ADC_Keywords: Atomic physics ; Spectra, millimetric/submm ; Molecular data Keywords: astrochemistry; ISM: molecules; methods: laboratory: molecular; molecular data; techniques: spectroscopic Abstract: The deuteration mechanism of molecules in the interstellar medium is still being debated. Observations of deuterium-bearing species in several astronomical sources represent a powerful tool to improve our understanding of the interstellar chemistry. The doubly deuterated form of the astrophysically interesting amidogen radical could be a target of detection in space. In this work, the rotational spectrum of the ND2 radical in its ground vibrational and electronic X2B1 state has been investigated between 588 and 1131GHz using a frequency modulation millimeter/submillimeter-wave spectrometer. The ND2 molecule has been produced in a free-space glass absorption cell by discharging a mixture of ND3 and Ar. Sixty-four new transition frequencies involving J values from 2 to 5 and Ka values from 0 to 4 have been measured. A global analysis including all the previous field-free pure rotational data has been performed, allowing for a more precise determination of a very large number of spectroscopic parameters. Accurate predictions of rotational transition frequencies of ND2 are now available from a few gigahertz up to several terahertz. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 79 932 Observed transition frequencies of ND2
Description of file: apjsaa9220.tar.gz in the FTP section provides the files used with the SPFIT/SPCAT program suite. There are 8 files of supplementary material, including a ReadMe, which was created by the AAS data editors. The text files are as follows: 1_Explan.txt = information on the content of the other files. 2ND2.fit = the output file of the fit of spectroscopic data used in the present study. 3ND2.lin = the corresponding line file. 4ND2.par = the corresponding parameter file. 5ND2.cat = the output file of the prediction made with the parameters determined in this study. 6ND2.var = the corresponding parameter file 7ND2.int = the corresponding intensity file See also: J/ApJ/820/L26 : J=1-0 transitions of argonium (ArH+) (Bizzocchi+, 2016) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Nup [1/13] Upper N quantum number 5- 6 I2 --- Kaup [0/10] Upper Ka quantum number 8- 9 I2 --- Kcup [0/12] Upper Kc quantum number 11- 12 I2 --- Jup [1/14] Upper J quantum number 14 I1 --- F1up [1/9]? Upper F1 quantum number (1) 16 I1 --- IDup [0/2]? Upper ID quantum number (1) 18- 19 I2 --- Fup [1/11]? Upper F quantum number (1) 21- 22 I2 --- Nlo [0/12] Lower N quantum number 24 I1 --- Kalo [0/9] Lower Ka quantum number 26- 27 I2 --- Kclo [0/11] Lower Kc quantum number 29- 30 I2 --- Jlo [1/13] Lower J quantum number 32- 33 I2 --- F1lo [1/10]? Lower F1 quantum number (1) 35 I1 --- IDlo [0/2]? Lower ID quantum number (1) 37- 38 I2 --- Flo [1/12]? Lower F quantum number (1) 40- 52 F13.5 MHz Freq [102.5/1131081] Experimental rest frequency (2) 54- 59 F6.4 MHz e_Freq [0.0007/1] Estimated uncertainties of the rest frequency (2) 61- 68 F8.5 MHz O-C [-1.3/1.4] Observed minus calculated value (2) 70- 75 F6.4 --- Weight [0.0002/1]? Relative weight for blended lines 77- 79 A3 --- Ref Reference (3)
Note (1): Not indicated if hyperfine structure is not resolved (value is blank). Note (2): Units are in cm-1 for transitions from reference (d) Note (3): References as follows: (a) = Cook et al. (1983JChPh..78.2144C); (b) = Kanada et al. (1991JChPh..94.3423K); (c) = This work; (d) = Morino et al. (1997JMoSp.182..428M).
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Jan-2018
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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