There is no 3 G term since its ( M _ L = 4, M _ S = 1 ) state would require two electrons each with ( M _ L = 2, M _ S = + 1 / 2 ), in violation of the Pauli principle . ( Here M _ L and M _ S are the components of the total orbital angular momentum L and total spin S along the z-axis chosen as the direction of an external magnetic field .)
