Sum Rules for B(M1,0+ -> 1+) Strength in IBM-3 and IBM-4

P. Halse, P. Van Isacker, B. R. Barrett

Sum rules for $B(M1,0_1^{+}\to 1_i^{+})$ strength are derived for even-even nuclei in the isospin-invariant forms of the IBM, IBM-3 and IBM-4, in the cases where the respective…