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Fix collision track feature for photon transport (#3946)

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Co-authored-by: Paul Romano <paul.k.romano@gmail.com>
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Patrick Shriwise 2026-06-08 18:37:34 -05:00 • committed by GitHub
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@ -792,6 +792,11 @@ collision_track.h5 file at the end of the simulation. The file contains
300 recorded collisions that occurred in materials with IDs 1 or 2, involving
fission or (n,2n) reactions on the nuclides U-238 or O-16, within cells
with IDs 5 and 12.
.. note::
Electron and positron collision-track events are not associated with a
specific nuclide. If a ``nuclides`` entry is specified, these events are omitted.
The file can be read using :func:`openmc.read_collision_track_file`.
The example below shows how to extract the data from the collision_track
feature and displays the fields stored in the file: