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Phys. Rev. Lett. 81, 61 - 64 (1998)

Breakup of 11Be: Prompt or Delayed?

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J. E. Bush, P. A. Hausladen, and D. P. Balamuth
University of Pennsylvania, Philadelphia, Pennsylvania 19104

K. R. Pohl
Environmental Protection Agency, Office of Radiation and Indoor Air, National Air and Radiation Environmental Laboratory, Montgomery, Alabama 36104,
and University of Pennsylvania, Philadelphia, Pennsylvania 19104

D. Bazin, J. A. Brown, J. A. Caggiano, L. L. Chen, B. S. Davids, D. J. Morrissey, B. M. Sherrill, and M. Thoennessen
National Superconducting Cyclotron, Michigan State University, East Lansing, Michigan 48826

Received 20 March 1998

The disintegration of a secondary beam of 11Be has been studied in the Coulomb plus nuclear field of Au and Be targets. The vector momentum (longitudinal and transverse components) was measured with a magnetic spectrograph with sufficient precision to detect previously reported differences in the velocity of the 10Be fragments and the incident beam. Coincident γ rays, detected by an array of BaF2 scintillators surrounding the target, were used to identify events in which the target was simultaneously excited. No evidence for the previously suggested velocity difference was observed.


©1998 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.81.61
DOI: 10.1103/PhysRevLett.81.61
PACS: 25.60.Gc, 27.20.+n

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