VERIFICATION OF A CORRELATED ENERY STRAGGLING, ANGULAR SCATTERING MODEL FOR HEAVY CHARGED PARTICLES IN MCNP6.2

摘要

With the release of Version 6.2 of MCNP imminent, we have investigated a physics model in the code that correlates energy straggling and angular scattering. This model is an expansion of the default straggling model currently available to users, and is used solely for heavy charged particles in MCNP6, meaning all charged particles previously available in the code, save for electrons and positrons. This new physics model is valid in the 1 MeV to 1 GeV particle energy regime, providing benefits to health physics, space research, and accelerator simulations. Preliminary results have shown simulation speedups up to 17%, and speedup is seen to increase with atomic number and the number of particle histories in the simulation. The accuracy of energy deposition is within error of previous straggling and scattering models. Preliminary results are encouraging, and further verification and validation is underway.