Macroscopic pairing vibrational model, self-consistent pairing coupling constant, and the fifth term of von Weizs ̈ acker's semiempirical formula

The implementation of a number-conserving formalism for pair-addition and pair-removal modes has impaired the possibility of developing an intuitive and self-consistent picture for collective pairing modes. In this paper, we show how a relaxation of this constraint leads to a unified model with true predictive powe