radis.db.degeneracies module¶
Created on Sat Oct 28 18:47:39 2017.
@author: erwan
State-dependant and state-independant degeneracies for molecules
- gi(M, I)[source]¶
State independant degeneracy.
- Parameters
M (int) – molecule id
I (int) – isotope number
References
Šimečková 2006: “Einstein A-coefficients and statistical weights for molecular absorption transitions in the HITRAN database”. DOI 10.1016/j.jqsrt.2005.07.003
- gs(M, I)[source]¶
State dependant degeneracy.
- Parameters
M (int) – molecule id
I (int) – isotope number
References
Šimečková 2006: “Einstein A-coefficients and statistical weights for molecular absorption transitions in the HITRAN database”. DOI 10.1016/j.jqsrt.2005.07.003
CO2:
For the 12C16O2, 13C16O2, 12C18O2 isotopologues, the statistical weights gs of the symmetric s and antisymmetric a rotational levels are 1 and 0, respectively (see Fig. 99 of Ref. [24], Fig. 17-6 of Ref. [26]). For the 16O12C18O, 16O12C17O, 16O13C18O, 16O13C17O, 17O12C18O isotopologues, the statistical weights gs of all the rotational levels are 1"