radis.phys.constants module

Physical constants.

Note : more units available in : - scipy.constants - sympy.physics.units


Av = 6.02214129e+23[source]

Avogadro constant (molecules / mol)

Type

float

Ry = 13.60569253[source]

Rydberg unit of energy (eV)

Type

float

a_0 = 5.29177e-11[source]

First Bohr radius (m)

Type

float

c = 299792458.0[source]

light velocity (m/s)

Type

float

c_CGS = 29979245800.0[source]

Light velocity (cm / s)

Type

float

eV = 1.60217657e-19[source]

electron volt (J)

Type

float

eps_0 = 8.854187817e-12[source]

Vacuum permittivity (Farads / m)

Type

float

h = 6.62606957e-34[source]

Planck constant (m2.kg.s-1 = J.s)

Type

float

h_CGS = 6.626196e-27[source]

Planck constant (erg * s)

Type

float

hc_k = 1.4387769599838154[source]

cm to K conversion (~ 1.44 K/cm), used in Boltman factors

Type

float

k_b = 1.3806488e-23[source]

Boltzmann constant (m2.kg.s-2.K-1)

Type

float

k_b_CGS = 1.380648813e-16[source]

Boltzman constant (erg / K)

Type

float

m_e = 9.10938291e-31[source]

Electron mass (kg)

Type

float