1. Direct Evidence for Octupole Deformation in Ba146 and the Origin of Large E1 Moment Variations in Reflection-Asymmetric Nuclei
- Author
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Bucher, B, Zhu, S, Wu, CY, Janssens, RVF, Bernard, RN, Robledo, LM, Rodríguez, TR, Cline, D, Hayes, AB, Ayangeakaa, AD, Buckner, MQ, Campbell, CM, Carpenter, MP, Clark, JA, Crawford, HL, David, HM, Dickerson, C, Harker, J, Hoffman, CR, Kay, BP, Kondev, FG, Lauritsen, T, Macchiavelli, AO, Pardo, RC, Savard, G, Seweryniak, D, and Vondrasek, R
- Subjects
Nuclear and Plasma Physics ,Synchrotrons and Accelerators ,Physical Sciences ,nucl-ex ,Mathematical Sciences ,Engineering ,General Physics ,Mathematical sciences ,Physical sciences - Abstract
Despite the more than 1 order of magnitude difference between the measured dipole moments in ^{144}Ba and ^{146}Ba, the octupole correlations in ^{146}Ba are found to be as strong as those in ^{144}Ba with a similarly large value of B(E3;3^{-}→0^{+}) determined as 48(+21-29) W.u. The new results not only establish unambiguously the presence of a region of octupole deformation centered on these neutron-rich Ba isotopes, but also manifest the dependence of the electric dipole moments on the occupancy of different neutron orbitals in nuclei with enhanced octupole strength, as revealed by fully microscopic calculations.
- Published
- 2017