radis.phys.constants module

Physical constants.

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


Av = 6.02214076e+23[source]

Avogadro constant (molecules / mol)

https://physics.nist.gov/cgi-bin/cuu/Value?na|search_for=avogadro

Type

float

Ry = 13.605693122994[source]

Rydberg unit of energy (eV)

https://physics.nist.gov/cgi-bin/cuu/Value?rydhcev|search_for=rydberg

Type

float

a_0 = 5.29177e-11[source]

First Bohr radius (m)

Type

float

c = 299792458.0[source]

light velocity (m/s)

https://physics.nist.gov/cgi-bin/cuu/Value?c

Type

float

c_CGS = 29979245800.0[source]

Light velocity (cm / s)

Type

float

eV = 1.602176634e-19[source]

electron volt (J)

https://physics.nist.gov/cgi-bin/cuu/Value?e

Type

float

eps_0 = 8.8541878128e-12[source]

Vacuum permittivity (Farads / m)

https://physics.nist.gov/cgi-bin/cuu/Value?ep0|search_for=vacuum+permittivity

Type

float

h = 6.62607015e-34[source]

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

https://physics.nist.gov/cgi-bin/cuu/Value?h|search_for=planck

Type

float

h_CGS = 6.626196e-27[source]

Planck constant (erg * s)

Type

float

hc_k = 1.4387768775039338[source]

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

Type

float

k_b = 1.380649e-23[source]

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

https://physics.nist.gov/cgi-bin/cuu/Value?k|search_for=boltzmann

Type

float

k_b_CGS = 1.380648813e-16[source]

Boltzman constant (erg / K)

Type

float

m_e = 9.1093837015e-31[source]

Electron mass (kg)

https://physics.nist.gov/cgi-bin/cuu/Value?me|search_for=electron+mass

Type

float