angle coupling
1.The screened hydrogenic model is employed to calculate the oscillator strength of the 5s 2 1S 0-5s5p 1P 1 resonance transition in Cd-like ions (Z=48-74). The expression for the oscillator strength of the 5s 2 1S 0-5s5p 3P 1 is given, with the introduction of the correctional coefficient K and the mixing angle in jj -coupling.
9.In the SU_L(2)×U(1) model we assume the existence of Hierarchy relation of the VEV values of Higgs fields and the coupling constants, and propose a discrete symmetry on the Lagrangian and therefore obtain the Cabibbo angle in terms of quarks mas- ses: tg θ_c= (m_d/m_s)~(1/2) which has only been derived by some authors in the SU_L(2)× SU_R(2)×U(1) model.

