Observation Of A Low-lying Neutron-unbound State In C-19
- Thoennessen, M.
- Mosby, S.
- Badger, N. S
- Baumann, T.
- Bazin, D.
- Bennett, M.
- Brown, J.
- Christian, G.
- DeYoung, Paul A
- Finck, J. E
- Gardner, M.
- Hook, E. A
- Luther, B.
- Meyer, D. A
- Mosby, M.
- Rogers, W. F
- Smith, J. K
- Spyrou, A.
- Strongman, M. J
DOIAbstract
Proton removal reactions from a secondary N-22 beam were utilized to populate unbound states in neutronrich carbon isotopes. Neutrons were measured with the Modular Neutron Array (MoNA) in coincidence with carbon fragments. A resonance with a decay energy of 76(14) keV was observed in the system C-18 + n corresponding to a state in C-19 at an excitation energy of 653(95) keV. This resonance could correspond to the first 5/2(+) state which was recently speculated to be unbound in order to describe In and 2n removal cross section measurements from C-20. (C) 2013 Elsevier B.V. All rights reserved
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