Negative photon heating

Hi!

I am looking at photon dose in a volume. The volume is separated from the source by a shield. I use the heating score over the volume cell and combine it with the particle filter for photons. I then run the problem for increasing shield thicknesses. The problem is that I get negative heating scores. Does anyone have a clue as to what I am doing wrong here?

Hi www.ebba.com,

It would be more helpful for us if we could take a look at your script.