27 #include <CLHEP/Units/PhysicalConstants.h>
33 using CLHEP::Avogadro;
35 using CLHEP::c_squared;
36 using CLHEP::h_Planck;
37 using CLHEP::hbar_Planck;
39 using CLHEP::hbarc_squared;
40 using CLHEP::electron_charge;
41 using CLHEP::e_squared;
42 using CLHEP::electron_mass_c2;
43 using CLHEP::proton_mass_c2;
44 using CLHEP::neutron_mass_c2;
48 using CLHEP::epsilon0;
49 using CLHEP::elm_coupling;
50 using CLHEP::fine_structure_const;
51 using CLHEP::classic_electr_radius;
52 using CLHEP::electron_Compton_length;
53 using CLHEP::Bohr_radius;
54 using CLHEP::alpha_rcl2;
55 using CLHEP::twopi_mc2_rcl2;
56 using CLHEP::k_Boltzmann;
57 using CLHEP::STP_Temperature;
58 using CLHEP::STP_Pressure;
59 using CLHEP::kGasThreshold;
60 using CLHEP::universe_mean_density;