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
- c = 299792458.0[source]¶
light velocity (m/s)
https://physics.nist.gov/cgi-bin/cuu/Value?c
- 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
- hc_k = 1.4387768775039338[source]¶
cm to K conversion (~ 1.44 K/cm), used in Boltzmann 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
- m_e = 9.1093837015e-31[source]¶
Electron mass (kg)
https://physics.nist.gov/cgi-bin/cuu/Value?me|search_for=electron+mass
- Type:
float