The LAW 61 description in the MCNP5 manual mentions that the locator can be 0 for isotropic angular distributions but the actual coding does not take this into account. In addition, the new ACE file specifications do not mention this possibility either. This appears in acefc.f90.
The LAW 44 pretty printing appears to skip ahead by too much for the photonuclear data (acepn.f90).
These things came up developing the feature/pn-iaea branch, reported by Skip Kahler.
The LAW 61 description in the MCNP5 manual mentions that the locator can be 0 for isotropic angular distributions but the actual coding does not take this into account. In addition, the new ACE file specifications do not mention this possibility either. This appears in acefc.f90.
The LAW 44 pretty printing appears to skip ahead by too much for the photonuclear data (acepn.f90).
These things came up developing the feature/pn-iaea branch, reported by Skip Kahler.