celeritas/io/GammaNuclearXsReader.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/io/GammaNuclearXsReader.hh
0006 //---------------------------------------------------------------------------//
0007 #pragma once
0008
0009 #include <string>
0010
0011 #include "corecel/inp/Grid.hh"
0012 #include "corecel/math/Quantity.hh"
0013 #include "corecel/math/UnitUtils.hh"
0014 #include "celeritas/UnitTypes.hh"
0015 #include "celeritas/Units.hh"
0016 #include "celeritas/phys/AtomicNumber.hh"
0017
0018 namespace celeritas
0019 {
0020 //---------------------------------------------------------------------------//
0021 /*!
0022  * Load the gamma-nuclear cross section (G4PARTICLEXSDATA/gamma) data
0023  */
0024 class GammaNuclearXsReader
0025 {
0026   public:
0027     //!@{
0028     //! \name Type aliases
0029     using result_type = inp::Grid;
0030     using MmSqMicroXs
0031         = Quantity<UnitProduct<units::Millimeter, units::Millimeter>, double>;
0032     //!@}
0033
0034   public:
0035     // Construct the reader using from the environment variable
0036     explicit GammaNuclearXsReader();
0037
0038     // Construct the reader from the path to the data directory and the type
0039     GammaNuclearXsReader(char const* path);
0040
0041     // Read the data for the given element
0042     result_type operator()(AtomicNumber atomic_number) const;
0043
0044   private:
0045     // Directory containing the gamma-nuclear cross section data
0046     std::string path_;
0047 };
0048
0049 //---------------------------------------------------------------------------//
0050 }  // namespace celeritas