reduced_mass

plasmapy.atomic.reduced_mass(test_particle, target_particle) → astropy.units.quantity.Quantity

Find the reduced mass between two particles.

Parameters:
  • target_particle (test_particle,) –
  • or Constant (Quantity,) – The test particle as represented by a string, an integer representing atomic number, a Particle object, or a Quantity or Constant with units of mass.
Returns:

reduced_mass – The reduced mass between the test particle and target particle.

Return type:

Quantity

Raises:

Example

>>> from astropy import units as u
>>> reduced_mass('p+', 'e-')
<Quantity 9.10442514e-31 kg>
>>> reduced_mass(5.4e-27 * u.kg, 8.6e-27 * u.kg)
<Quantity 3.31714286e-27 kg>