RFactor.from_gterms#

classmethod RFactor.from_gterms(gterms, pterms=[cos(\phi_i - \phi_j)*cos(\phi_k - \phi_l)/3, sqrt(3)*sin(\phi_i - \phi_j)*sin(\phi_k - \phi_l)/6, sqrt(5)*(cos(\phi_i - \phi_j - \phi_k + \phi_l) + cos(\phi_i - \phi_j + \phi_k - \phi_l) + 6*cos(\phi_i + \phi_j - \phi_k - \phi_l))/60], angles='dummy')[source]#

Make RFactor from G-factor and polarization terms.

Parameters

  • gterms (Sequence[sympy.core.basic.Basic]) – Spherical tensor components of G-factor.

  • pterms (Sequence[sympy.core.basic.Basic]) – Spherical tensor components of four-fold polarization tensor.

  • angles (str) – R-factor as a function of ‘dummy’ (phis) or ‘experimental` (thetas) angles, has to match pterms.

  • optional – R-factor as a function of ‘dummy’ (phis) or ‘experimental` (thetas) angles, has to match pterms.