radis.db.degeneracies moduleĀ¶

Created on Sat Oct 28 18:47:39 2017.

@author: erwan

State-dependant and state-independent degeneracies for molecules

gi(M, I)[source]Ā¶

State independent degeneracy.

Parameters:
  • M (int) ā€“ molecule id

  • I (int) ā€“ isotope number

References

Å imečkovĆ” 2006: ā€œEinstein A-coefficients and statistical weights for molecular absorption transitions in the HITRAN databaseā€. DOI 10.1016/j.jqsrt.2005.07.003

gs(M, I)[source]Ā¶

State dependant degeneracy.

Parameters:
  • M (int) ā€“ molecule id

  • I (int) ā€“ isotope number

References

Å imečkovĆ” 2006: ā€œEinstein A-coefficients and statistical weights for molecular absorption transitions in the HITRAN databaseā€. 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"