New dynamical pair breaking effect

Details New dynamical pair breaking effect New dynamical pair breaking effect

2009-07-08

arxiv.org/abs/0907.1347v1

Phys.Lett.B680:316-320,2009

Physics

Nuclear Physics

Nuclear Theory

6 pages, 3 figures

Scientific paper

10.1016/j.physletb.2009.09.035

A dynamical pair breaking effect is evidenced at very low excitation energies. For this purpose, a new set of time-dependent coupled channel equations for pair-breaking in superfluid systems are deduced from the variational principle. These equations give the probability to destroy or to create a Cooper pair under the action of some perturbations or when the mean field varies in time. The odd-even effect in fission is investigated within the model as an example. For this purpose, the time-dependent probability to find the system in a seniority-one or in a seniority-two state is restricted in the sense that the perturbations are considered only in the avoided crossing regions.

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