H13CN, v = 0
Hydrogen Cyanide, 13C isotopic species, v = 0
Species tag 028501
Date of EntryNov 2014
ContributorH. S. P. Müller

The second entry from May 2006 has been revised considerably. Additional infrared data involving states v2 = 2 and 3 as well as v3 = 1 and v1 = 1 were included along with additional pure rotational data pertaining to v2 = 2 and 3.
The first entry from April 2000 has been revised completely. Both v = 0 and v2 = 1 data were treated together. Data for both vibrational states, including v2 = 1 direct-l-type transitions up to J = 35 were reported in
(1) U. Fuchs, S. Brünken, G. W. Fuchs, S. Thorwirth, V. Ahrens, F. Lewen, S. Urban, T. Giesen, and G. Winnewisser, 2004, Z. Naturforsch. 59a, 861.
Additional v = 0 data come from
(2) G. Cazzoli and C. Puzzarini, 2005, J. Mol. Spectrosc. 233, 280;
and from
(3) F. Maiwald, F. Lewen, V. Ahrens, M. Beaky, R. Gendriesch, A. N. Koroliev, A. A. Negirev, D. G. Paveljev, B. Vohwinkel, and G. Winnewisser 2000, J. Mol. Spectrosc. 202, 166.
Further direct-l-type transitions 6 ≤ J ≤ 15 were published in
(4) M. Winnewisser and J. Vogt, 1978, Z. Naturforsch. 33a, 1323.
The 3rd entry also employs v2 = 2 and 3 rotational data from
(5) J. Preusser and A. G. Maki, 1993, J. Mol. Spectrosc. 162, 484.
The fit also takes into account the very extensive infrared data between the various vibrational states from
(6) A. G. Maki, G. C. Mellau, S. Klee, M. Winnewisser, and W. Quapp, 2000, J. Mol. Spectrosc. 202, 67.
The main improvement occured in the partition function, which is essentially converged at 300 K and probably still good up to about 500 K. The rotational part is well converged up to 1000 K. The frequencies are also better at higher values of J. Predictions above 6 THz should be viewed with some caution.
The dipole moment was assumed to be the same as for the main isotopic species; see e027501.cat.
The 14N hyperfine splitting can be resolved for low values of J. Therefore, a separate 14N hyperfine calculation is provided for J" ≤ 5. Note: the spin multiplicity gI of 3 for the 14N nucleus has been considered in the calculation of the partition function and the upper state degeneracy gup. In very cold and quiescent sources it may be warranted to consider 13C and 1H hyperfine splitting in addition to that caused by the 14N nucleus. Therefore, a separate hyperfine calculation for all three nuclei is provided for J" ≤ 1. Note: the spin multiplicity gI of 2 for the 13C and 1H nuclei has not been considered in the calculation of the partition function and the upper state degeneracy gup. Therefore, if hyperfine structure due to the 13C and 1H nuclei are considered also all partition function values have to be multiplied by 4.
The partition function takes into account all vibrational states used in the fit.

Lines Listed89
Frequency / GHz< 7453
Max. J89
log STR0-23.0
log STR1-23.0
Isotope Corr.-1.955
Egy / (cm–1)0.0
 µa / D2.9852
 µb / D 
 µc / D 
detected in ISM/CSMyes

Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schloeder