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Phys. Rev. C 57, 2156 - 2164 (1998)

Probing the halo structure of 19,17,15C and 14B

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D. Bazin, W. Benenson, B. A. Brown, J. Brown *, B. Davids, M. Fauerbach †, P. G. Hansen, P. Mantica, D. J. Morrissey, C. F. Powell, B. M. Sherrill, and M. Steiner
National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

Received 9 December 1997

We have measured the parallel momentum distributions of outcoming fragments in the one-neutron breakup of the odd-mass carbon isotopes 19,17,15C and 14B. Owing to their low neutron separation energies, the study of these nuclei is of particular interest regarding the appearance of the halo phenomenon. Discrepancies between experiment and theory observed for 15C and 14B indicate that their halos are not as prominent as in 11Be or 11Li, and that core excitations start playing a role in the breakup mechanism. In 17C the halo appears hindered by a d-wave neutron ground state configuration. Finally, the data on 19C suggests an s-wave neutron around the 2+ excited state in 18C.


©1998 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.57.2156
DOI: 10.1103/PhysRevC.57.2156
PACS: 25.70.Mn, 21.10.Dr, 21.60.Cs, 27.20.+n

* Present address: Department of Physics, Allegheny College, Meadville, PA 16335.
† Present address: Department of Physics, Florida State University, Tallahassee, FL 32306.

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