Annihilators of Irreducible Modules and Kinematical Constraints of Pair Operators

Abstract

The kinematical constraints of pair operators in nuclear collective motion, pointed out by Yamamura and identified by Nishiyama as relations between so(2n) generators, are recognized as equations satisfied by second-degree annihilators (deduced in previous work) of irreducible so(2n)-modules. The recursion relations for Nishiyama's tensors and their dependence on the parity of the tensor degree are explained. An explanation is also given for the recursion relation for the sp(2n) tensors pointed out by Hwa and Nuyts. The statements for the algebras so(2n) and sp(2n) are proved simultaneously.