Autor: |
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. |
Rok vydání: |
2015 |
Předmět: |
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Zdroj: |
Phys. Rev. C 91, 034323 (2015) |
Druh dokumentu: |
Working Paper |
DOI: |
10.1103/PhysRevC.91.034323 |
Popis: |
Background: Theoretical calculations have shown that the energy and angular correlations in the three-body decay of the two-neutron unbound O26 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 O26, including the decay mechanism and ground-state resonance energy. Method: O26 was produced in a one-proton knockout reaction from F27 and the O24+n+n decay products were measured using the MoNA-Sweeper setup. The three-body correlations from the O26 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 O26. A 1{\sigma} upper limit of 53 keV was extracted for the ground-state resonance energy of O26. Conclusions: Future attempts to measure the three-body correlations from the ground-state decay of O26 will be very challenging due to the need for a precise measurement of the O24 momentum at the reaction point in the target. |
Databáze: |
arXiv |
Externí odkaz: |
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