A correction to Birksʹ Law in liquid argon ionization chamber simulations for highly ionizing particles

We present a study of the performance of Birksʹ Law in liquid argon ionization chamber simulations as applied to highly ionizing particles, such as particles with multiple electric charges or with magnetic charge. We used Birksʹ Law to model recombination effects in a Geant4 simulation of heavy ions in a liquid argon calorimeter. We then compared the simulation to published heavy-ion data to extract a highly ionizing particle correction to Birksʹ Law.