added pdg codes for nuclei

corsika/detail/framework/core/ParticleProperties.inl

@@ -32,6 +32,10 @@ namespace corsika {
     return particle::detail::pdg_codes[static_cast<CodeIntType>(p)];
   }
 
+  inline PDGCode constexpr get_PDG(unsigned int A, unsigned int Z) {
+    return static_cast<PDGCode>(1000000000 + Z * 10000 + A + 10); // 10LZZZAAAI
+  }
+
   inline int16_t constexpr get_charge_number(Code const code) {
     if (code == Code::Nucleus)
       throw std::runtime_error("charge of particle::Nucleus undefined");

corsika/framework/core/ParticleProperties.hpp

@@ -88,6 +88,8 @@ namespace corsika {
 
   //! Particle code according to PDG, "Monte Carlo Particle Numbering Scheme"
   PDGCode constexpr get_PDG(Code const);
+  PDGCode constexpr get_PDG(unsigned int A, unsigned int Z);
+  
   std::string_view constexpr get_name(Code const); //!< name of the particle as string
   TimeType constexpr get_lifetime(Code const);     //!< lifetime