19#define pc_atomic_mass_constant_energy_equivalent 1.492418062E-10 /*- atomic mass constant energy equivalent [J] uncertainty=0.000 000 018 e-10 -*/
20#define pc_atomic_mass_constant_energy_equivalent_in_MeV 931.4940954 /*- atomic mass constant energy equivalent in MeV [MeV] uncertainty=0.000 0057 -*/
21#define pc_atomic_mass_unit_electron_volt_relationship 931494095.4 /*- atomic mass unit-electron volt relationship [eV] uncertainty=0.000 0057 e6 -*/
28#define pc_atomic_unit_of_1st_hyperpolarizability 3.206361329E-53 /*- atomic unit of 1st hyperpolarizability [C^3 m^3 J^{-2}] uncertainty=0.000 000 020 e-53 -*/
29#define pc_atomic_unit_of_2nd_hyperpolarizability 6.235380085E-65 /*- atomic unit of 2nd hyperpolarizability [C^4 m^4 J^{-3}] uncertainty=0.000 000 077 e-65 -*/
30#define pc_atomic_unit_of_action 1.054571800E-34 /*- atomic unit of action [J s] uncertainty=0.000 000 013 e-34 -*/
31#define pc_atomic_unit_of_charge 1.6021766208E-19 /*- atomic unit of charge [C] uncertainty=0.000 000 0098 e-19 -*/
32#define pc_atomic_unit_of_charge_density 1.0812023770E+12 /*- atomic unit of charge density [C m^{-3}] uncertainty=0.000 000 0067 e12 -*/
33#define pc_atomic_unit_of_current 0.006623618183 /*- atomic unit of current [A] uncertainty=0.000 000 041 e-3 -*/
34#define pc_atomic_unit_of_electric_dipole_mom 8.478353552E-30 /*- atomic unit of electric dipole mom. [C m] uncertainty=0.000 000 052 e-30 -*/
35#define pc_atomic_unit_of_electric_field 5.142206707E+11 /*- atomic unit of electric field [V m^{-1}] uncertainty=0.000 000 032 e11 -*/
36#define pc_atomic_unit_of_electric_field_gradient 9.717362356E+21 /*- atomic unit of electric field gradient [V m^{-2}] uncertainty=0.000 000 060 e21 -*/
37#define pc_atomic_unit_of_electric_polarizability 1.6487772731E-41 /*- atomic unit of electric polarizability [C^2 m^2 J^{-1}] uncertainty=0.000 000 0011 e-41 -*/
38#define pc_atomic_unit_of_electric_potential 27.21138602 /*- atomic unit of electric potential [V] uncertainty=0.000 000 17 -*/
39#define pc_atomic_unit_of_electric_quadrupole_mom 4.486551484E-40 /*- atomic unit of electric quadrupole mom. [C m^2] uncertainty=0.000 000 028 e-40 -*/
40#define pc_atomic_unit_of_energy 4.359744650E-18 /*- atomic unit of energy [J] uncertainty=0.000 000 054 e-18 -*/
41#define pc_atomic_unit_of_force 8.23872336E-8 /*- atomic unit of force [N] uncertainty=0.000 000 10 e-8 -*/
42#define pc_atomic_unit_of_length 5.2917721067E-11 /*- atomic unit of length [m] uncertainty=0.000 000 000 12 e-10 -*/
43#define pc_atomic_unit_of_mag_dipole_mom 1.854801999E-23 /*- atomic unit of mag. dipole mom. [J T^{-1}] uncertainty=0.000 000 011 e-23 -*/
44#define pc_atomic_unit_of_mag_flux_density 235051.7550 /*- atomic unit of mag. flux density [T] uncertainty=0.000 000 014 e5 -*/
45#define pc_atomic_unit_of_magnetizability 7.8910365886E-29 /*- atomic unit of magnetizability [J T^{-2}] uncertainty=0.000 000 0090 e-29 -*/
46#define pc_atomic_unit_of_mass 9.10938356E-31 /*- atomic unit of mass [kg] uncertainty=0.000 000 11 e-31 -*/
47#define pc_atomic_unit_of_momum 1.992851882E-24 /*- atomic unit of mom.um [kg m s^{-1}] uncertainty=0.000 000 024 e-24 -*/
48#define pc_atomic_unit_of_permittivity 1.112650056E-10 /*- atomic unit of permittivity [F m^{-1}] uncertainty=(exact) -*/
49#define pc_atomic_unit_of_time 2.418884326509E-17 /*- atomic unit of time [s] uncertainty=0.000 000 000 014 e-17 -*/
50#define pc_atomic_unit_of_velocity 2187691.26277 /*- atomic unit of velocity [m s^{-1}] uncertainty=0.000 000 000 50 e6 -*/
107#define pc_electron_proton_mass_ratio 0.000544617021352 /*- electron-proton mass ratio [] uncertainty=0.000 000 000 52 e-4 -*/
108#define pc_electron_tau_mass_ratio 0.000287592 /*- electron-tau mass ratio [] uncertainty=0.000 26 e-4 -*/
109#define pc_electron_to_alpha_particle_mass_ratio 0.0001370933554798 /*- electron to alpha particle mass ratio [] uncertainty=0.000 000 000 045 e-4 -*/
110#define pc_electron_to_shielded_helion_mag_mom_ratio 864.058257 /*- electron to shielded helion mag. mom. ratio [] uncertainty=0.000 010 -*/
111#define pc_electron_to_shielded_proton_mag_mom_ratio -658.2275971 /*- electron to shielded proton mag. mom. ratio [] uncertainty=0.000 0072 -*/
112#define pc_electron_triton_mass_ratio 0.0001819200062203 /*- electron-triton mass ratio [] uncertainty=0.000 000 000 084 e-4 -*/
113#define pc_electron_volt 1.6021766208E-19 /*- electron volt [J] uncertainty=0.000 000 0098 e-19 -*/
114#define pc_electron_volt_atomic_mass_unit_relationship 1.0735441105E-9 /*- electron volt-atomic mass unit relationship [u] uncertainty=0.000 000 0066 e-9 -*/
124#define pc_Faraday_constant_for_conventional_electric_current 96485.3251 /*- Faraday constant for conventional electric current [C_{90} mol^{-1}] uncertainty=0.0012 -*/
260#define pc_Planck_constant_in_eV_s 4.135667662E-15 /*- Planck constant in eV s [eV s] uncertainty=0.000 000 025 e-15 -*/
261#define pc_Planck_constant_over_2_pi 1.054571800E-34 /*- Planck constant over 2 pi [J s] uncertainty=0.000 000 013 e-34 -*/
262#define pc_Planck_constant_over_2_pi_in_eV_s 6.582119514E-16 /*- Planck constant over 2 pi in eV s [eV s] uncertainty=0.000 000 040 e-16 -*/
263#define pc_Planck_constant_over_2_pi_times_c_in_MeV_fm 197.3269788 /*- Planck constant over 2 pi times c in MeV fm [MeV fm] uncertainty=0.000 0012 -*/
342#define pc_Wien_frequency_displacement_law_constant 5.8789238E+10 /*- Wien frequency displacement law constant [Hz K^{-1}] uncertainty=0.000 0034 e10 -*/
343#define pc_Wien_wavelength_displacement_law_constant 0.0028977729 /*- Wien wavelength displacement law constant [m K] uncertainty=0.000 0017 e-3 -*/