How to get absorption,scattering and refraction coefficient
 

I am a fluent user who try to attempt DO model. I am confused by the material's parameters, such as absorption,scattering and refraction coefficient. Since I have search them for many days without any achievement, I hope an expert who is familiar about this can help me.

You can reply me here or through email zzb5392526@163.com.

Thanks.

Dwyane