epyr.constants

Physical constants for EPR/NMR spectroscopy All values from 2022 CODATA recommendations with proper units and uncertainties Constants available in both SI and CGS units.

Functions

avogadro([return_uncertainty])	Avogadro constant in SI units (mol⁻¹).
bmagn([return_uncertainty])	Bohr magneton in SI units (J T⁻¹).
boltzm([return_uncertainty])	Boltzmann constant in SI units (J⋅K⁻¹).
clight()	Speed of light in vacuum in SI units (m⋅s⁻¹).
constants_summary()	Print summary of all physical constants with units and values.
echarge([return_uncertainty])	Elementary charge in SI units (C).
evolt([return_uncertainty])	Electron volt in SI units (J).
frequency_to_magnetic_field(freq_hz[, g_factor])	Convert frequency to magnetic field.
gamma_hz([g_factor])	Calculate gyromagnetic ratio in Hz/T for any g-factor.
gfree([return_uncertainty])	Free electron g-factor (dimensionless).
hbar()	Reduced Planck constant ℏ = h/(2π) in SI units (J⋅s).
magnetic_field_to_frequency(B_tesla[, g_factor])	Convert magnetic field to resonance frequency.
nmagn([return_uncertainty])	Nuclear magneton in SI units (J⋅T⁻¹).
planck()	Planck constant in SI units (J⋅s = J⋅Hz⁻¹).
thermal_energy(temperature_k)	Thermal energy k_B T at given temperature.
wavelength_to_frequency(wavelength_m)	Convert wavelength to frequency.