Coexistence of transverse and longitudinal wobbling modes in 187Au
Abstract
Nuclear wobbling motion has been investigated in the 187Au nucleus. The 174Yb(19F,6n)187Au reaction was used to populate the levels of interest using the Gammasphere array. Detailed analysis has revealed two separate wobbling bands built on (πh9 / 2)1 and (πh11 / 2)- configurations. The wobbling nature of these bands has been verified by angular distribution measurements showing a ΔI = 1, E2 nature of the nω + 1 -->nω transitions. Most interestingly, the two structures have been found to exhibit different types of wobbling: transverse and longitudinal. 187Au is the case of the first cleanly established longitudinal wobbler and of the coexistence of both forms of wobbling, a phenomenon never observed before. Particle Rotor Model calculations have been found to be in good agreement with the experiment.
This work has been supported by the U.S. National Science Foundation [Grants No. PHY-1713857, PHY-1559848, and PHY-1203100].- Publication:
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APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DNP.SH004S