Lille Spectroscopic Database
Code:
Ohashi-Ilyushin code for methylamine
| Version | 2021.08.hfs |
| Tag | 32802 |
| Molecule - Descriptor | Methylamine, Methanamine (13CH3NH2) - v=0 |
| Isotope | 13C |
| Hyperfine | Yes |
| Lines in DB | 82178 |
| Frequency max. (MHz) | 1499946.6019 |
| J max. | 50 |
| Cite these data as | Motiyenko R.A., Margulès L., Ilyushin V.V., Smirnov I.A., Alekseev E.A., Halfen D.T., Ziurys L.M. 2016, A&A, 587, A152 https://doi.org/10.1051/0004-6361/201526924 |
| T(K) | Qt | Qrot | Qvib |
|---|---|---|---|
| 300.0 | 95725.950 | 95725.95 | 1.0 |
| 200.0 | 52070.610 | 52070.61 | 1.0 |
| 150.0 | 33807.510 | 33807.51 | 1.0 |
| 50.0 | 6497.430 | 6497.43 | 1.0 |
| 10.0 | 579.720 | 579.72 | 1.0 |
Details:
Each energy level is characterized by the quantum numbers
J and K = Ka, together with the overall torsion–wagging–rotation symmetry species
Γ, corresponding to an irreducible representation of the permutation–inversion group
G12. To distinguish between the two components of doubly degenerate levels of
E1 or E2 symmetry with identical J and K values, the labels
E1+1 and E1−1, or E2+1 and E2−1 are employed, where the +1 and −1 components correspond to
k = +K and k = −K, respectively. When table includes hyperfine levels, the standard quantum number
F = J + I is included in the level designation.
The correspondence between the integer symmetry identifier Sym used in the .cat file and the symmetry species
Γ is summarized in the table below.
| Sym | 3 | -3 | 4 | -4 | 1 | -1 | 2 | -2 |
| Γ | A1 | A2 | B1 | B2 | E1+1 | E1-1 | E2+1 | E2-1 |
The dipole moments of the 12C species were used in the calculations