Three-body correlations in the ground-state decay of O26

Kohley, Z.; Baumann, T.; Christian, G.; DeYoung, P. A.; Finck, J. E.; Frank, N.; Luther, B.; Lunderberg, E.; Jones, M.; Mosby, S.; Smith, J. K.; Spyrou, A.; Thoennessen, M.

doi:10.1103/PhysRevC.91.034323

Three-body correlations in the ground-state decay of ${}^{26}O$

Journal Article · Fri Mar 20 00:00:00 EDT 2015 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.91.034323· OSTI ID:1454776

Kohley, Z. ^[1]; Baumann, T. ^[2]; Christian, G. ^[3]; DeYoung, P. A. ^[4]; Finck, J. E. ^[5]; Frank, N. ^[6]; Luther, B. ^[7]; Lunderberg, E. ^[4]; Jones, M. ^[3]; Mosby, S. ^[3]; Smith, J. K. ^[3]; Spyrou, A. ^[3]; Thoennessen, M. ^[3]

Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory and Department of Chemistry; UC Berkeley
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory and Department of Physics & Astronomy
Hope College, Holland, MI (United States). Department of Physics
Central Michigan University, Mt. Pleasant, MI (United States). Department of Physics
Augustana College, Rock Island, IL (United States). Department of Physics & Astronomy
Concordia College, Moorhead, MN (United States). Department of Physics

Background: Theoretical calculations have shown that the energy and angular correlations in the three-body decay of the two-neutron unbound ²⁶O can provide information on the ground-state wave function, which has been predicted to have a dineutron configuration and 2n halo structure. Purpose: To use the experimentally measured three-body correlations to gain insight into the properties of ²⁶O, including the decay mechanism and ground-state resonance energy. Method: ²⁶O was produced in a one-proton knockout reaction from ²⁷F and the ²⁴O + n + n decay products were measured using the MoNA-Sweeper setup. Additionally, the three-body correlations from the ²⁶O ground-state resonance decay were extracted. The experimental results were compared to Monte Carlo simulations in which the resonance energy and decay mechanism were varied. Results: The measured three-body correlations were well reproduced by the Monte Carlo simulations but were not sensitive to the decay mechanism due to the experimental resolutions. However, the three-body correlations were found to be sensitive to the resonance energy of ²⁶O. A 1σ upper limit of 53 keV was extracted for the ground-state resonance energy of ²⁶O. Conclusions: Lastly, future attempts to measure the three-body correlations from the ground-state decay of ²⁶O will be very challenging due to the need for a precise measurement of the ²⁴O momentum at the reaction point in the target.

View Accepted Manuscript (DOE)

Research Organization:: Nuclear Science and Security Consortium, Berkeley, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0000979

OSTI ID:: 1454776

Journal Information:: Physical Review C, Nuclear Physics, Journal Name: Physical Review C, Nuclear Physics Journal Issue: 3 Vol. 91; ISSN 0556-2813; ISSN PRVCAN

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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