pdg_system_of_units

reactions.pdg_system_of_units = <reactions.pdg_system_of_units_sgl object>

Object to serve as an interface with the PDG system of units. This object is declared as a singleton. Any call from a PDG element to an accessor will use the system of units defined in this class. Currently only the energy units can be modified, which must be eV, keV, MeV, GeV, TeV or PeV. The GeV units are used by default.