em/process/EPlusAnnihilationProcess.hh

0001 //------------------------------- -*- C++ -*- -------------------------------//
0002 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details
0003 // SPDX-License-Identifier: (Apache-2.0 OR MIT)
0004 //---------------------------------------------------------------------------//
0005 //! \file celeritas/em/process/EPlusAnnihilationProcess.hh
0006 //---------------------------------------------------------------------------//
0007 #pragma once
0008
0009 #include <memory>
0010
0011 #include "celeritas/Types.hh"
0012 #include "celeritas/phys/ImportedProcessAdapter.hh"
0013 #include "celeritas/phys/ParticleParams.hh"
0014 #include "celeritas/phys/Process.hh"
0015
0016 namespace celeritas
0017 {
0018 //---------------------------------------------------------------------------//
0019 /*!
0020  * Annihiliation process for positrons.
0021  */
0022 class EPlusAnnihilationProcess final : public Process
0023 {
0024   public:
0025     //!@{
0026     //! \name Type aliases
0027     using SPConstParticles = std::shared_ptr<ParticleParams const>;
0028     using SPConstImported = std::shared_ptr<ImportedProcesses const>;
0029     //!@}
0030
0031   public:
0032     // Construct from particle data
0033     explicit EPlusAnnihilationProcess(SPConstParticles particles,
0034                                       SPConstImported process_data);
0035
0036     // Construct the models associated with this process
0037     VecModel build_models(ActionIdIter start_id) const final;
0038
0039     // Get the interaction cross sections for the given energy range
0040     StepLimitBuilders step_limits(Applicability range) const final;
0041
0042     //! Whether the integral method can be used to sample interaction length
0043     bool supports_integral_xs() const final { return true; }
0044
0045     //! Whether the process applies when the particle is stopped
0046     bool applies_at_rest() const final { return applies_at_rest_; }
0047
0048     // Name of the process
0049     std::string_view label() const final;
0050
0051   private:
0052     SPConstParticles particles_;
0053     ParticleId positron_id_;
0054     bool applies_at_rest_;
0055 };
0056
0057 //---------------------------------------------------------------------------//
0058 }  // namespace celeritas