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Neutron occupancy of 0d5/2 orbital in 24O

Abstract : The partial one-neutron removal cross section of 24O leading to the first excited state in 23O has been measured to be 65.7 ± 5.3 mb with a proton target in inverse kinematics at the beam energy of 62 MeV/nucleon. The decay energy spectrum of the neutron unbound state of 23O was reconstructed from the measured four momenta of 22O and the emitted neutron. A sharp peak was observed at Edecay = 48 ± 3 keV, confirming the previous measurements. The measured partial longitudinal momentum distribution of 23O* showed the d-wave knockout character, providing a support for the Jπ assignment of 5/2+ for this state. The spectroscopic factor for the neutrons in 0d5/2 orbital was deduced, for the first time, to be C2S(0d5/2) = 3.7 ± 0.3 (preliminary) by comparing with the result of Glauber model. The relatively large spectroscopic factor supports the N = 16 shell closure in the neutron drip-line nucleus 24O.
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http://hal.in2p3.fr/in2p3-01017235
Contributor : Sandrine Guesnon <>
Submitted on : Wednesday, July 2, 2014 - 9:59:17 AM
Last modification on : Tuesday, November 24, 2020 - 11:30:12 AM

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K. Tshoo, Y. Satou, H. Bhang, S. Choi, T. Nakamura, et al.. Neutron occupancy of 0d5/2 orbital in 24O. INPC 2013 - International Nuclear Physics Conference, 2013, Firenze, Italy. pp.02103, ⟨10.1051/epjconf/20146602103⟩. ⟨in2p3-01017235⟩

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