arc.divalent_atom_functions.DivalentAtom.getQuadrupoleMatrixElement#
- DivalentAtom.getQuadrupoleMatrixElement(n1, l1, j1, n2, l2, j2, s=0.5)[source]#
Radial part of the quadrupole matrix element
Calculates \(\int \mathbf{d}r~R_{n_1,l_1,j_1}(r)\cdot R_{n_1,l_1,j_1}(r) \cdot r^4\). See Quadrupole calculation example snippet .
- Parameters
n1 (int) – principal quantum number of state 1
l1 (int) – orbital angular momentum of state 1
j1 (float) – total angular momentum of state 1
n2 (int) – principal quantum number of state 2
l2 (int) – orbital angular momentum of state 2
j2 (float) – total angular momentum of state 2
s (float) – optional. Spin of the state. Default 0.5 is for Alkali
- Returns
quadrupole matrix element (\(a_0^2 e\)).
- Return type