Hello everyone, I am working a two-shell nuclear model under the proxy-SU(3) scheme. I have encountered in one of my calculations the following coefficient between couplings of shells 5 and 6:
⟨[2^3,1]⊗[1], (25,2)⊗(6,0),(31,2),0||| 𝑎†(6,0)1/2 ||| [2^3,1]⊗[0], (25,2)⊗(0,0),(25,2),1/2⟩𝜌=1
where 𝑎† creates a particle on the shell 6 while leaving the lower 5 shell unchanged. The current computer SU(3) packages are not able to calculate it. I have not found any reference to a two-shell model like this either. Could anyone please help me on how can I perform such calculation or share some reference on this matter? Thanks a lot.