For a neutron-rich nucleus such as Ca48 , one has S GT− ≫ S GT+ , so the sum rule is dominated by the total GT − strength

The Ikeda sum rule, S GT− −S GT+ = 3(N −Z), (6) provides a model-independent check on the completeness of the calculated states

1 Pith paper cite this work. Polarity classification is still indexing.

1 Pith paper citing it