add Spawning ntuple recording secondary births per step

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Each step that spawns secondaries now writes one row per secondary to a
new Spawning ntuple (event_id, parent_track_id, parent_step_no,
child_track_id). This enables direct shower-tree reconstruction without
position joins. Requires the companion Geant4 submodule change that
pre-assigns track IDs in ProcessSecondariesFromParticleChange.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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Lars Bogner

2026-06-11 10:25:08 +02:00

parent 718f9361f7

commit 9ea0718139

3 changed files with 21 additions and 1 deletions

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lib/geant4

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Submodule lib/geant4 updated: 41f2dd7996...e7827c9b07