einstein_coeff¶
- sbpy.activity.einstein_coeff(mol_data)[source]¶
Einstein coefficient from molecular data
- Parameters
- mol_data
phys
phys
object that contains the following data, usingastropy.units
for the required units:Transition frequency in MHz
Temperature in Kelvins
Integrated line intensity at 300 K in MHz * nm**2
Integrated line intensity at desired temperature
Partition function at 300 K (Dimensionless)
Partition function at designated temperature (Dimensionless)
Upper state degeneracy (Dimensionless)
Upper level energy in Joules
Lower level energy in Joules
Degrees of freedom (Dimensionless)
Keywords that can be used for these values are found under
fieldnames
documentation. We recommend the use of the JPL Molecular Spectral Catalog and the use offrom_jplspec
to obtain these values in order to maintain consistency. Yet, if you wish to use your own molecular data, it is possible. Make sure to inform yourself on the values needed for each function, their units, and their interchangeable keywords as part of the data class.
- mol_data
- Returns
- einstein_coeff
Quantity
Spontaneous emission coefficient (1/s), which can be appended to the original
sbpy.phys
object for future calculations
- einstein_coeff