Nuclear Schiff moment and soft vibrational modes

Abstract

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.

14 pages, 4 figures

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Cited by in corpus (7)

• Electric Dipole Moments of the Atoms, Molecules, Nuclei and Particles
• Nuclear Structure and the Search for Collective Enhancement of P,T-Violation
• Nuclear Structure Features of Gamow-Teller Excitations
• Collective dipole excitations in sodium clusters
• Quadrupole collectivity in random two-body ensembles
• A new avenue in the search for CP violation: Moessbauer spectroscopy of 227-Ac
• Dipole resonances and the nuclear Schiff moment