Enhanced [Formula Presented]-odd, [Formula Presented]-odd electromagnetic moments in reflection asymmetric nuclei

V. Spevak, N. Auerbach, V. V. Flambaum

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Collective [Formula Presented]- and [Formula Presented]-odd moments produced by parity and time invariance violating forces in reflection asymmetric nuclei are considered. The enhanced collective Schiff, electric dipole, and octupole moments appear due to the mixing of rotational levels of opposite parity. These moments can exceed single-particle moments by more than 2 orders of magnitude. The enhancement is due to the collective nature of the intrinsic moments and the small energy separation between members of parity doublets. In turn these nuclear moments induce enhanced [Formula Presented]- and [Formula Presented]-odd effects in atoms and molecules. A simple estimate is given and a detailed theoretical treatment of the collective [Formula Presented]-, [Formula Presented]-odd electric moments in reflection asymmetric, odd-mass nuclei is presented. In the present work we improve on the simple liquid drop model by evaluating the Strutinsky shell correction and include corrections due to pairing. Calculations are performed for octupole deformed long-lived odd-mass isotopes of Rn, Fr, Ra, Ac, and Pa and the corresponding atoms. Experiments with such atoms may improve substantially the limits on time reversal violation.

Original languageEnglish
Pages (from-to)1357-1369
Number of pages13
JournalPhysical Review C - Nuclear Physics
Issue number3
StatePublished - 1997


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