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Two-neutron sequential decay of 24O

PHYSICAL REVIEW C (2015)

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PHYSICAL REVIEW C
卷 92, 期 5, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.92.051306

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Physics, Nuclear

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  1. National Science Foundation [PHY14-04236, PHY12-05537, PHY11-02511, PHY11-01745, PHY14-30152, PHY09-69058, PHY12-05357]
  2. Department of Energy National Nuclear Security Administration [DE-NA0000979]
  3. Direct For Mathematical & Physical Scien
  4. Division Of Physics [1404236] Funding Source: National Science Foundation
  5. Direct For Mathematical & Physical Scien
  6. Division Of Physics [1306074, 1430152] Funding Source: National Science Foundation

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

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