[P01] If you need to add more transition to the files, you need to 
add oscillator strength (f_lu) and quantum mechanical damping coefficient (Gamma_damp)
for corresponding transition.

[P02] The file atom.dat contains f_lu and Gamma_damp for most known transition.

[P03] The file atom.dat is taken from VPFIT code version 10.4
The code does "NOT" internally use atom.dat file

[P04] However, code internally uses "specie_transition_properties.txt" file

[P05] The file  

