[jrivera]

Hello,

As i wrote in the title, i need to access to that variable. Specifically, i need the absorption coefficient of a gas, but it depends on a lot of things, so, i'll use curves of emissivity for different p*Leff of this gas to obtain its emissivity, replace this emissivity in the equation e = 1 - exp(kpL), (with e: emissivity, k: absorption coefficient, p: partial gas pressure, Lath length) getting the value of k, but to do this i need the value of L or at least the way of getting it from a CEL expression.
The gas is SO2, there aren't enough information about the radiative properties of this gas, so i have to do this from this way. If anyone have information about the absorption coefficient of this gas, i'll be very grateful.
I'm sorry for my bad english. Thanks for the future answers.

Jorge