[WIP] Update atomic masses to AME2020 #1385
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Description
The Atomic Mass Data Center (AMDC) released an updated Atomic Mass Evaluation (AME2020) dataset in March. This is a work-in-progress PR to update from the old AME2016 data (#1281).
Motivation and Context
Updates atomic mass unit data.
Changes
AME mass data update.
Behavior
Atomic mass data changes slightly.
Other Information
I think the core source updates are OK - they are a copy of PR #1281's code changes, as well as one regex update due to a format change between AME2016 and AME2020.
However running
nuc_data_make --clean 2 --fetch-prebuilt False --make atomic_mass,materials
is currently unsuccessful for building the new nuclear data. The issues are described in #1333. The first problem is KAERI data is no longer hosted on data.pyne.io. I got around this by hosting the kaeri.zip on my website and using that link, but then I ran up against the super-heavy elements issue and downloads failing as KAERI's data website is offline.Once #1333 and pyne/data # 24 are ready, I will return to this PR and complete the second step needed - updating all the tests.
Changelog file
Will fill out changelog once everything is successful.