Structure of $^{240}$Pu: Evidence for Octupole Phonon Condensation?

X. Wang; R. V. F. Janssens; M. P. Carpenter; S. Zhu; I. Wiedenhöver; U. Garg; S. Frauendorf; T. Nakatsukasa; I. Ahmad; A. Bernstein; E. Diffenderfer; S. J. Freeman; J. P. Greene; T. L. Khoo; F. G. Kondev; A. Larabee; T. Lauritsen; C. J. Lister; B. Meredith; D. Seweryniak; C. Teal; P. Wilson

doi:10.1103/physrevlett.102.122501

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arXiv · 0902.4179

Structure of $^{240}$Pu: Evidence for Octupole Phonon Condensation?

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Abstract

The expanded level structure of $^{240}$Pu available from the present study highlights the role of strong octupole correlations in this nucleus. Besides a delayed alignment in the yrast band, the observations include the presence of both $I^{+}{\to}(I-1)^{-}$ and $I^{-}{\to}(I-1)^{+}$ E1 transitions linking states of the yrast and negative-parity bands at high spin and the presence of an additional even-spin, positive-parity band deexciting exclusively to the negative parity sequence. The observations appear to be consistent with expectations based on the recently proposed concept of octupole phonon condensation.

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X. Wang, R. V. F. Janssens, M. P. Carpenter, S. Zhu, I. Wiedenhöver, U. Garg, S. Frauendorf, T. Nakatsukasa, I. Ahmad, A. Bernstein, E. Diffenderfer, S. J. Freeman, J. P. Greene, T. L. Khoo, F. G. Kondev, A. Larabee, T. Lauritsen, C. J. Lister, B. Meredith, D. Seweryniak, C. Teal, P. Wilson. 2009-02-24. Structure of $^{240}$Pu: Evidence for Octupole Phonon Condensation?. https://doi.org/10.1103/physrevlett.102.122501

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