Two-Neutron Sequential Decay of $^{24}$O

M. D. Jones; N. Frank; T. Baumann; J. Brett; J. Bullaro; P. A. DeYoung; J. E. Finck; K. Hammerton; J. Hinnefeld; Z. Kohley; A. N. Kuchera; J. Pereira; A. Rabeh; W. F. Rogers; J. K. Smith; A. Spyrou; S. L. Stephenson; K. Stiefel; M. Tuttle-Timm; R. G. T. Zegers; M. Thoennessen

doi:10.1103/physrevc.92.051306

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arXiv · 1512.02528

Two-Neutron Sequential Decay of $^{24}$O

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Abstract

A two-neutron unbound excited state of $^{24}$O was populated through a (d,d') reaction at 83.4 MeV/nucleon. A state at $E = 715 \pm 110$ (stat) $\pm 45 $ (sys) keV with a width of $Γ< 2$ MeV was observed above the two-neutron separation energy placing it at 7.65 $\pm$ 0.2 MeV with respect to the ground state. Three-body correlations for the decay of $^{24}$O $\rightarrow$ $^{22}$O + $2n$ show clear evidence for a sequential decay through an intermediate state in $^{23}$O. Neither a di-neutron nor phase-space model for the three-body breakup were able to describe these correlations.

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M. D. Jones, N. Frank, T. Baumann, J. Brett, J. Bullaro, P. A. DeYoung, J. E. Finck, K. Hammerton, J. Hinnefeld, Z. Kohley, A. N. Kuchera, J. Pereira, A. Rabeh, W. F. Rogers, J. K. Smith, A. Spyrou, S. L. Stephenson, K. Stiefel, M. Tuttle-Timm, R. G. T. Zegers, M. Thoennessen. 2015-12-08. Two-Neutron Sequential Decay of $^{24}$O. https://doi.org/10.1103/physrevc.92.051306

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