Nuclear Schiff moment and soft vibrational modes

Details Nuclear Schiff moment and soft vibrational modes Nuclear Schiff moment and soft vibrational modes

2008-03-20

arxiv.org/abs/0803.2915v1

Phys.Rev.C78:014310,2008

Physics

Nuclear Physics

Nuclear Theory

14 pages, 4 figures

Scientific paper

10.1103/PhysRevC.78.014310

The atomic electric dipole moment (EDM) currently searched by a number of experimental groups requires that both parity and time-reversal invariance be violated. According to current theoretical understanding, the EDM is induced by the nuclear Schiff moment. The enhancement of the Schiff moment by the combination of static quadrupole and octupole deformation was predicted earlier. Here we study a further idea of the possible enhancement in the absence of static deformation but in a nuclear system with soft collective vibrations of two types. Both analytical approximation and numerical solution of the simplified problem confirm the presence of the enhancement. We discuss related aspects of nuclear structure which should be studied beyond mean-field and random phase approximations.

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