/usr/share/fisx/ is in python-fisx-common 1.1.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/fisx/BindingEnergies.dat
/usr/share/fisx/EADL97_BindingEnergies.dat
/usr/share/fisx/EADL97_KShellConstants.dat
/usr/share/fisx/EADL97_KShellNonradiativeRates.dat
/usr/share/fisx/EADL97_KShellRadiativeRates.dat
/usr/share/fisx/EADL97_LShellConstants.dat
/usr/share/fisx/EADL97_LShellNonradiativeRates.dat
/usr/share/fisx/EADL97_LShellRadiativeRates.dat
/usr/share/fisx/EADL97_MShellConstants.dat
/usr/share/fisx/EADL97_MShellNonradiativeRates.dat
/usr/share/fisx/EADL97_MShellRadiativeRates.dat
/usr/share/fisx/EPDL97_CrossSections.dat
/usr/share/fisx/KShellConstants.dat
/usr/share/fisx/KShellRates.dat
/usr/share/fisx/LShellConstants.dat
/usr/share/fisx/LShellRates.dat
/usr/share/fisx/MShellConstants.dat
/usr/share/fisx/MShellRates.dat
/usr/share/fisx/README.rst
/usr/share/fisx/TODO
/usr/share/fisx/XCOM_CrossSections.dat
/usr/share/fisx/changelog.txt