Constants

$h$	...	PLANCK's constant	$6.6260755 \times 10^{-34}$Js
$\hbar$	...	Reduced PLANCK's constant	$h / (2 \pi)$
${\mathrm{k_B}}$	...	BOLTZMANN's constant	$1.380662 \times 10^{-23}$JK$^{-1}$
$\ensuremath {\mathrm{q}}$	...	Elementary charge	$1.6021892 \times 10^{-19}$C
$\ensuremath{\mathrm{m}}_0$	...	Electron rest mass	$9.1093897 \times 10^{-31}$kg
$\kappa_0$	...	Dielectric constant	$8.8541878 \times 10^{-12}$AsV$^{-1}$m$^{-1}$
$\imath$	...	$\sqrt{-1}$