1. Investigation of negative-parity states in Dy 156: Search for evidence of tetrahedral symmetry
- Author
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Miller, S., Dudek, J., Wang, X., Piot, J., Lauritsen, T., Carpenter, M.P., Werner, V., Majola, S.N.T., Gall, B.J.P., Chiara, C.J., Redon, N., Hartley, D.J., Kondev, F.G., Miller, D., Kulp, W.D., Wood, J.L., Zhu, S., Sharpey-Schafer, J.F., Stefanescu, I., McCutchan, E.A., Cooper, N., Janssens, R.V.F., Yu, C.-H., Simpson, J., Allmond, J.M., Curien, D., Garrett, P.E., Riley, M.A., Beausang, C.W., and Riedinger, L.L.
- Abstract
An experiment populating low/medium-spin states in Dy156 was performed to investigate the possibility of tetrahedral symmetry in this nucleus. In particular, focus was placed on the low-spin, negative-parity states since recent theoretical studies suggest that these may be good candidates for this high-rank symmetry. The states were produced in the Nd148(C12,4n) reaction and the Gammasphere array was utilized to detect the emitted γ rays. B(E2)/B(E1) ratios of transition probabilities from the low-spin, negative-parity bands were determined and used to interpret whether these structures are best associated with tetrahedral symmetry or, as previously assigned, to octupole vibrations. In addition, several other negative-parity structures were observed to higher spin and two new sequences were established.
- Published
- 2017
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