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File indexing completed on 2025-09-16 08:52:22
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/NeutronXsReader.hh 0006 //---------------------------------------------------------------------------// 0007 #pragma once 0008 0009 #include <string> 0010 0011 #include "corecel/math/Quantity.hh" 0012 #include "corecel/math/UnitUtils.hh" 0013 #include "celeritas/UnitTypes.hh" 0014 #include "celeritas/Units.hh" 0015 #include "celeritas/inp/Grid.hh" 0016 #include "celeritas/phys/AtomicNumber.hh" 0017 0018 namespace celeritas 0019 { 0020 //---------------------------------------------------------------------------// 0021 /*! 0022 * Types of microscopic cross sections in G4PARTICLEXSDATA/neutron data. 0023 */ 0024 enum class NeutronXsType 0025 { 0026 cap, //!< Capture cross section 0027 el, //!< Elastic cross section 0028 inel, //!< Inelastic cross section 0029 size_ 0030 }; 0031 0032 //---------------------------------------------------------------------------// 0033 /*! 0034 * Load the neutron cross section (G4PARTICLEXSDATA/neutron) data by the 0035 * interaction type (capture, elastic, and inelastic). 0036 */ 0037 class NeutronXsReader 0038 { 0039 public: 0040 //!@{ 0041 //! \name Type aliases 0042 using result_type = inp::Grid; 0043 using MmSqMicroXs 0044 = Quantity<UnitProduct<units::Millimeter, units::Millimeter>, double>; 0045 //!@} 0046 0047 public: 0048 // Construct the reader and locate the data using the environment variable 0049 explicit NeutronXsReader(NeutronXsType type); 0050 0051 // Construct the reader from the path to the data directory and the type 0052 NeutronXsReader(NeutronXsType type, char const* path); 0053 0054 // Read the data for the given element 0055 result_type operator()(AtomicNumber atomic_number) const; 0056 0057 private: 0058 // Type and directory containing the neutron elastic cross section data 0059 NeutronXsType type_; 0060 std::string path_; 0061 }; 0062 0063 //---------------------------------------------------------------------------// 0064 // FREE FUNCTIONS 0065 //---------------------------------------------------------------------------// 0066 0067 // Get the string value for a neutron cross section type 0068 char const* to_cstring(NeutronXsType value); 0069 0070 //---------------------------------------------------------------------------// 0071 } // namespace celeritas
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