h5utils.constants package

Submodules

h5utils.constants.physcon module

This module provides Physical constants. It was originally written by Herman J.C. Berendsen.

The data originates from the CODATA 2006 release. See http://www.physics.nist.gov/PhysRefData/contents.html.

This could be replaced by scipy.constants in the future.

Example usage:

>>> import h5utils.constants.physcon as physcon
>>> physcon.help()
Available functions:
[note: key must be a string, within quotes!]
  value(key) returns value (float)
  sd(key)    returns standard deviation (float)
  relsd(key) returns relative standard deviation (float)
  descr(key) prints description with units

Available global variables:
  alpha, a_0, c, e, eps_0, F, G, g_e, g_p, gamma_p, h, hbar, k_B
  m_d, m_e, m_n, m_p, mu_B, mu_e, mu_N, mu_p, mu_0, N_A, R, sigma, u

Available keys:
['alpha', 'alpha-1', 'amu', 'avogadro', 'bohrmagn', 'bohrradius', 'boltzmann', 'charge-e', 'conduct-qu', 'dirac', 'elec-const', 'faraday', 'gas', 'gfactor-e', 'gfactor-p', 'gravit', 'gyromagratio-p', 'josephson', 'lightvel', 'magflux-qu', 'magn-const', 'magnmom-e', 'magnmom-p', 'magres-p', 'mass-d', 'mass-d/u', 'mass-e', 'mass-e/u', 'mass-mu', 'mass-mu/u', 'mass-n', 'mass-n/u', 'mass-p', 'mass-p/u', 'nuclmagn', 'planck', 'ratio-me/mp', 'ratio-mp/me', 'rydberg', 'stefan-boltzm']
>>> physcon.value('lightvel')
299792458.0
>>> physcon.sd('lightvel')
0.0
>>> physcon.relsd('lightvel')
0.0
>>> physcon.descr('lightvel')
Description of  lightvel :
  Name:                velocity of light in vacuum
  Symbol (if avail.):  c
  Value:               299792458.0
  Standard deviation:  0.0
  Relative stdev:      0.0
  value(sd) unit:      299 792 458(ex) m/s
  Source:              CODATA 2006
>>> physcon.get_c0()
299792458.0

h5utils.constants.physcon.descr(key)

Print description. See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_c0()

Returns the speed of light in SI units (m/s). See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_e()

Returns the charge of an electron in SI units (Coulomb). See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_eV()

Returns 1eV in SI units (Joules). See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_epsilon0()

Returns the dielectric permittivity of vacuum in SI units (F/m). See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_h()

Returns Planck’s constant in SI units (J*s). See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_h_eVs()

Returns Planck’s constant in eV. See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_hb()

Returns Dirac’s constant = h/(2 pi) in SI units (J*s). See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_me()

Returns the electron mass in SI units (kg). See h5utils.constants.physcon for examples.

h5utils.constants.physcon.get_mu0()

Returns the magnetic permeability of vacuum in SI units (N*A^-2). See h5utils.constants.physcon for examples.

h5utils.constants.physcon.help()

Print help. See h5utils.constants.physcon for examples.

h5utils.constants.physcon.relsd(key)

Print relative standard deviation. See h5utils.constants.physcon for examples.

h5utils.constants.physcon.sd(key)

Print standard deviation. See h5utils.constants.physcon for examples.

h5utils.constants.physcon.value(key)

Print value. See h5utils.constants.physcon for examples.

Module contents