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PhysicalConstants.py File Reference
Go to the source code of this file.
Namespaces
python.PhysicalConstants
Variables
float
python.PhysicalConstants.pi
= 3.14159265358979323846
int
python.PhysicalConstants.twopi
= 2 *
pi
float
python.PhysicalConstants.halfpi
=
pi
/ 2
float
python.PhysicalConstants.pi2
=
pi
*
pi
float
python.PhysicalConstants.Avogadro
= 6.02214076e23 /
Units.mole
float
python.PhysicalConstants.c_light
= 2.99792458e8 * Units.m / Units.s
float
python.PhysicalConstants.c_squared
= c_light * c_light
float
python.PhysicalConstants.h_Planck
= 6.62607015e-34 * Units.joule * Units.s
float
python.PhysicalConstants.hbar_Planck
= h_Planck /
twopi
float
python.PhysicalConstants.hbarc
= hbar_Planck * c_light
float
python.PhysicalConstants.hbarc_squared
= hbarc * hbarc
python.PhysicalConstants.electron_charge
= -Units.eplus
python.PhysicalConstants.e_squared
= Units.eplus * Units.eplus
float
python.PhysicalConstants.electron_mass_c2
= 0.510998910 * Units.MeV
float
python.PhysicalConstants.proton_mass_c2
= 938.272013 * Units.MeV
float
python.PhysicalConstants.neutron_mass_c2
= 939.56536 * Units.MeV
float
python.PhysicalConstants.amu_c2
= 931.494028 * Units.MeV
float
python.PhysicalConstants.amu
= amu_c2 / c_squared
int
python.PhysicalConstants.mu0
= 4 *
pi
* 1.0e-7 * Units.henry / Units.m
float
python.PhysicalConstants.epsilon0
= 1.0 / (c_squared * mu0)
python.PhysicalConstants.elm_coupling
= e_squared / (4 *
pi
* epsilon0)
float
python.PhysicalConstants.fine_structure_const
= elm_coupling / hbarc
float
python.PhysicalConstants.classic_electr_radius
= elm_coupling / electron_mass_c2
float
python.PhysicalConstants.electron_Compton_length
= hbarc / electron_mass_c2
float
python.PhysicalConstants.Bohr_radius
= electron_Compton_length / fine_structure_const
float
python.PhysicalConstants.alpha_rcl2
= fine_structure_const * classic_electr_radius * classic_electr_radius
tuple
python.PhysicalConstants.twopi_mc2_rcl2
float
python.PhysicalConstants.k_Boltzmann
= 8.617333e-11 * Units.MeV / Units.kelvin
float
python.PhysicalConstants.STP_Temperature
= 273.15 * Units.kelvin
float
python.PhysicalConstants.STP_Pressure
= 1.0 * Units.atmosphere
float
python.PhysicalConstants.kGasThreshold
= 10.0 * Units.mg /
Units.cm3
float
python.PhysicalConstants.universe_mean_density
= 1.0e-25 * Units.g /
Units.cm3
Generated on Tue Sep 2 2025 21:28:39 for ATLAS Offline Software by
1.8.18