Neutron-unbound states in 25,26F
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American Physical Society
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Abstract
Neutron-unbound states in 25F and 26F were populated via the reactions 9Be(26Ne,24F+n) and 9Be(26Ne,25F+n), respectively. A resonance close to the neutron separation energy in 25F was identified with a decay energy of 28 ± 4 keV. This resonance corresponds to an excited state in 25F at 4249 ± 116 keV assuming it decays to the ground state of 24F. Guided by shell-model calculations, a spin and parity of 1/2− can be assigned to this state. In the spectrum of 26F, which was produced in a nucleon-exchange reaction, there are indications for an excited state with a decay energy of ∼270 keV.
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Particles (Nuclear physics)
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Frank, N., et al. “Neutron-Unbound States in (25, 26) F.” Physical Review C, vol. 84, no. 3, Sept. 2011.
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