neutronpy.instrument.get_kfree

neutronpy.instrument.get_kfree(W, kfixed, ki_fixed=True)

Calculates the free wavevector, either ki or kf, as specified by ki_fixed.

Parameters:

W : float

Energy transfer

kfixed : float

Wavevector magnitude of the fixed k.

ki_fixed : bool, optional

If ki is fixed, set to True. Default: True

Returns:

k : float

Returns initial or final wavevector magnitude.