Discrepancy activation through photonuclear interaction, between fluka versions

Hi Cesc,

Thanks for the prompt response.

With regards to this issue and the 255-Ra post it might be beneficial to consider the timeline of FLUKA and possible modifications:
V2020, includes spin+parity corrections?
V4.0, no spin+parity corrections thus smaller cross-sections
v4.1, spin+parity corrections included

The post seems to indicate that the results in V2020 were in better agreement with available data.

To the extent that I have measured data to compare, Fluka 2020 seems closer to the truth.

Or was your comment regarding “new results” concerning the v4.1 results?

The cross-sections on 225-Ra shows a decrease going from V2020 to V4. Is this because spin+parity was taken into account in the 2020 version?

As we have seen no difference between the joint Fluka-2011 version and v4.0, does this mean Fluka-2011 also didnt take into account spin+parity, and this was added to a later version V2020?

I hope to get back to you on the issue of experimental data.

Kind regards,

Chris