Accurate Gaunt Factors for Nonrelativistic Quadrupole Bremsstrahlung

The exact result for non-relativistic quadrupole bremsstrahlung in a Coulomb field was established only recently Pradler & Semmelrock (2020). It requires the evaluation and integration of hypergeometric functions across wide range parameters arguments, which, practice, is unfeasible. Here we provide highly accurate tabulation Gaunt factor radiation, its thermal average Maxwellian plasma, associated cooling function over entire kinematically relevant range. In addition, simple approximate formula emission cross section which works to within few percent accuracy all practical purposes. results can be applied scattering electrons with themselves, radiation dominant process.