Adds MPACT library group structures and documentation to mgxs collection#2614

Merged

paulromano merged 2 commits intoopenmc-dev:developfrom bscollin:mpact_group_structure

Jul 25, 2023

+72-3

Commits on Jul 19, 2023

Adds MPACT library group structures and documentation to mgxs collection
bscollin
committed

Commits on Jul 25, 2023

Adds more citations, renames 252 group structure to SCALE-252
bscollin
committed