Fix Wentzel OK&VI transport cross section

celeritas-project / celeritas

Celeritas is a new Monte Carlo transport code designed to accelerate scientific discovery in high energy physics by improving detector simulation throughput and energy efficiency using GPUs.

https://celeritas-project.github.io/celeritas/user/index.html

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Fix Wentzel OK&VI transport cross section #1202

Closed amandalund closed 5 months ago

amandalund commented 5 months ago

When I implemented this I had forgotten that the screenZ in the Geant4 model is actually twice the screening coefficient (see https://github.com/celeritas-project/celeritas/pull/861#discussion_r1280849421). This fixes that missing factor of two.