qspec.gamma_e_kin  (  e ,  m  )[source]

The time-dilation/Lorentz factor $\gamma = 1 + E_\mathrm{kin} / (mc^2)$.

Parameters:

earray_like

The kinetic energy $E_\mathrm{kin}$ of a body (eV).

marray_like

The mass $m$ of the body (u).

Returns:

outndarray

The time-dilation/Lorentz factor $\gamma$ corresponding to the kinetic energy e of a body with mass m.