APS » PROLA » Phys. Rev. Lett. » Volume 77 » Issue 25

Phys. Rev. Lett. 77, 5020 - 5023 (1996)

Study of the Breakup Reaction 8B→ 7Be + p: Absorption Effects and E2 Strength
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J. H. Kelley1,2, Sam M. Austin1,2, A. Azhari1,2, D. Bazin1, J. A. Brown1, H. Esbensen4, M. Fauerbach1,2, M. Hellström1, S. E. Hirzebruch1, R. A. Kryger1, D. J. Morrissey1,3, R. Pfaff1,2, C. F. Powell1,3, E. Ramakrishnan1,2, B. M. Sherrill1,2, M. Steiner1,2, T. Suomijärvi1, and M. Thoennessen1,2
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
2Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
3Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
4Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

Received 9 July 1996

Distributions of parallel and transverse momenta for 7Be fragments formed in the breakup of 8B have been measured at 41A MeV. The p∥ distributions are narrow ( 81±4 and 62±3 MeV/c FWHM for Be and Au targets, respectively), comparable to those of neutron halo nuclei. Reaction mechanisms influence the 7Be momentum distributions, so they do not directly reflect the valence proton momentum wave function. We present reaction models that reproduce the distributions.


©1996 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v77/p5020
DOI: 10.1103/PhysRevLett.77.5020
PACS: 25.60.Gc, 21.10.Ft, 25.70.Mn, 27.20.+n

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