Electric Dipole States and Time Reversal Violation in Nuclei.

21st International School on Nuclear Physics and Applications & International Symposium on Exotic Nuclei

Auerbach, N.^1

School of Physics and Astronomy, Tel Aviv University, Tel Aviv

69978, Israel^1

关键词: Dipole strengths;    Electric dipole;    Giant resonances;    Inverse energy;    Isovector giant dipoles;    Neutron excess;    Nuclear Schiff moment;    Time reversal;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/724/1/012002/pdf
DOI  :  10.1088/1742-6596/724/1/012002

来源: IOP

【 摘 要 】

The nuclear Schiff moment is essential in the mechanism that induces a parity and time reversal violation in the atom. In this presentation we explore theoretically the properties and systematics of the isoscalar dipole in nuclei with the emphasis on the low-energy strength and the inverse energy weighted sum which determines the Schiff moment. We also study the influence of the isovector dipole strength distribution on the Schiff moment. The influence of a large neutron excess in nuclei is examined. The centroid energies of the isoscalar giant resonance (ISGDR) and the overtone of the isovector giant dipole resonance (OIVGDR) are given for a range of nuclei.