Grady Hughes LA_UR_1.. - Computational Medical Physics Working ...

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Features of MCNP6 Relevant toMedical Radiation PhysicsH. Grady Hughes and Tim GoorleyLos Alamos National Laboratory12 th International Conference on Radiation Shielding (ICRS–12)17 th Topical Meeting of the Radiation Protection and ShieldingDivision of the American Nuclear Society (RPSD–2012)Workshop on Computational Medical PhysicsSeptember 2–7, 2012Nara, JapanOperated by the Los Alamos National Security, LLC for the DOE/NNSA
AbstractMCNP (Monte Carlo N-Particle) is a general-purpose Monte Carlo code forsimulating the transport of neutrons, photons, electrons, positrons, and morerecently other fundamental particles and heavy ions. Over many years MCNPhas found a wide range of applications in many different fields, includingmedical radiation physics. In this presentation we will describe and illustratea number of significant recently-developed features in the current version ofthe code, MCNP6, having particular utility for medical physics. Among theseare major extensions of the ability to simulate large, complex geometries,improvement in memory requirements and speed for large lattices,introduction of mesh-based isotopic reaction tallies, advances in radiographysimulation, expanded variance-reduction capabilities, especially for pulseheighttallies, and a large number of enhancements in photon/electrontransport.Operated by the Los Alamos National Security, LLC for the DOE/NNSASlide 1
Page 1: LA-UR-12-24401Approved for public r
Page 5 and 6: MCNP Development Team• Los Alamos
Page 7 and 8: Features of Interest to Medical Phy
Page 9 and 10: Extended Limits on Problem SizeMCNP
Page 11 and 12: Large Lattice Improvements: Memory
Page 13: Electron Energy Straggling Improvem
Page 17 and 18: Photon Doppler Broadening• Releas
Page 19: Photon EnhancementsOperated by the
Page 23 and 24: Zubal Head GeometrySlide 21Operated
Page 25 and 26: N14(n,p)C14 ReactionSlide 23Operate
Page 27 and 28: Summary• MCNP is a powerful gener

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