reduced_mass¶

plasmapy.particles.atomic.
reduced_mass
(test_particle, target_particle) → astropy.units.quantity.Quantity¶ Find the reduced mass between two particles.
Parameters: Returns: reduced_mass – The reduced mass between the test particle and target particle.
Return type: Raises: InvalidParticleError
– If either particle is invalid.UnitConversionError
– If an argument is aQuantity
orConstant
but does not have units of mass.MissingAtomicDataError
– If the mass of either particle is not known.TypeError
– If either argument is not astr
,int
,Particle
,Quantity
, orConstant
.
Example
>>> from astropy import units as u >>> reduced_mass('p+', 'e') <Quantity 9.104425e31 kg> >>> reduced_mass(5.4e27 * u.kg, 8.6e27 * u.kg) <Quantity 3.31714286e27 kg>