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Phys. Rev. Lett. 91, 012501 (2003) [4 pages]

New Direct Reaction: Two-Proton Knockout from Neutron-Rich Nuclei
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D. Bazin1, B. A. Brown1,2, C. M. Campbell1,2, J. A. Church1,2, D. C. Dinca1,2, J. Enders1 *, A. Gade1,2, T. Glasmacher1,2, P. G. Hansen1,2 †, W. F. Mueller1, H. Olliver1,2, B. C. Perry1,2, B. M. Sherrill1,2, J. R. Terry1,2, and J. A. Tostevin3
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
2Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
3Department of Physics, School of Electronics and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom

Received 9 January 2003; published 30 June 2003

The reaction 9Be(28Mg,26Ne+γ)X has been studied at 82  MeV/nucleon together with two similar cases, 30Mg and 34Si. Strong evidence that the reactions are direct is offered by the parallel-momentum distributions of the reaction residues and by the inclusive cross sections. The pattern of the partial cross sections for 28Mg suggests the presence of correlations. A preliminary theoretical discussion based on eikonal reaction theory and the many-body shell model is presented. The reaction holds great promise for the study of neutron-rich nuclei.


©2003 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v91/e012501
DOI: 10.1103/PhysRevLett.91.012501
PACS: 21.10.Jx, 24.10.–i, 25.60.Gc, 27.30.+t

* Present address: Institut für Kernphysik, Technische Universität Darmstadt, Germany.
† Electronic address: hansen@nscl.msu.edu

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