Evaporation spectrum error when importing CE data

[hankyleh]

When running tools/data_library_generator/generate.py to import the Lib81 ACE data library, an error interrupts the library conversion, [ERROR]: Evaporation distribution temperature is not linearly interpolable. This error appears only for ACEtk.continuous.EvaporationSpectrum instances, and it appears for each one, preventing the remaining files from being converted.

From line 165 of util.py,

    if not data.interpolation_data.is_linear_linear:
        print_error(
            "Evaporation distribution temperature is not linearly interpolable"
        )

Checking data.interpolants for every one of these reactions returns 5, which corresponds to a log-log interpolation scheme per the ENDF manual (Table 16), so every evaporation spectrum reaction will call this error.

There are over 130 files in Lib81 that contain evaporation spectra (out of 4464 total files), and each one will interrupt the execution of generate.py.

I was able to import the full library anyway by changing print_error to print_note, but since log-log is the expected behavior of these reactions, I don't know if a note is appropriate here either, though I hesitate to skip importing this reaction, since I don't know if there are plans for MCDC to include support for it in the future.

[hankyleh]

PS I am interested in being assigned to resolve this issue, as I am interested in MCDC development and I think this would be a good first PR, but since the solution here is informed by MCDC philosophy (i.e. if support for evaporation spectra will be added in the future) I wanted to check first.

[ilhamv]

Hi Kyle!

I'm sorry for the slow response...

Yes, we gradually improve the support for all the secondary particle laws. The idea was that we add the support only if we need it. It is interesting that you get that error for version 81, because I think I'm also using that as the benchmark. Can you share the link where you get the library so that I can double-check?

Nevertheless, the gradual-support philosophy was there due to the limited developer resources. So, I fully support the work to resolve this issue, and thank you for your interest in working on this!