Phys. Rev. Lett.
99,
112501
(2007)
[4 pages]
Selective Population and Neutron Decay of an Excited State of 23O
A. Schiller1,*, N. Frank1,2,3, T. Baumann1, D. Bazin1, B. A. Brown1,2, J. Brown4, P. A. DeYoung5, J. E. Finck6, A. Gade1,2, J. Hinnefeld7, R. Howes8, J.-L. Lecouey1,†, B. Luther3, W. A. Peters1,2, H. Scheit1, M. Thoennessen1,2, and J. A. Tostevin1,2,9
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA 2Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA 3Department of Physics, Concordia College, Moorhead, Minnesota 56562, USA 4Department of Physics, Wabash College, Crawfordsville, Indiana 47933, USA 5Department of Physics, Hope College, Holland, Michigan 49423, USA 6Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA 7Department of Physics & Astronomy, Indiana University at South Bend, South Bend, Indiana 46634, USA 8Department of Physics, Marquette University, Milwaukee, Wisconsin 53201, USA 9School of Electronics and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom
Received 21 December 2006; revised 29 June 2007; published 12 September 2007
We have observed a resonance in neutron-fragment coincidence measurements that is presumably the first excited state of 23O at 2.8(1) MeV excitation energy which decays into the ground state of 22O. This interpretation is consistent with theory. The reaction mechanism supports the assignment of the observed state as the 5/2+ hole state. This assignment and the recently observed 3/2+ particle state advance the understanding of 23O.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.112501
DOI:
10.1103/PhysRevLett.99.112501
PACS:
21.10.Pc, 25.60.Je, 27.30.+t, 29.30.Hs
*schiller@nscl.msu.edu †Present address: Laboratoire de Physique Corpusculaire, ENSICAEN, IN2P3, 14050 Caen, Cedex, France.
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