scippneutron.conversion.tof.wavelength_from_Q

scippneutron.conversion.tof.wavelength_from_Q(*, Q, two_theta)

Compute the wavelength from momentum transfer.

The result is the de Broglie wavelength

\[\lambda = \frac{4 \pi \sin \theta}{Q}\]

Parameters:

• Q (Variable) – Momentum transfer.

• two_theta (Variable) – Scattering angle \(2 \theta\).

Returns:

Variable – Wavelength \(\lambda\) Has unit ångström.

See also

scippneutron.conversions.beamline

Definition of two_theta.