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Journal Article

Experimental evidence for the 8B ground state configuration


Scheit,  H.
Prof. Dirk Schwalm, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Cortina-Gil, D., Markenroth, K., Attallah, F., Baumann, T., Benlliure, J., Borge, M. J. G., et al. (2002). Experimental evidence for the 8B ground state configuration. Physics Letters B, 529(1-2), 36-41.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-84F9-0
The 7Be fragments produced in one-proton removal from relativistic 8B nuclei of 936 MeV/nucleon in a carbon target have been detected in coincidence with γ rays emitted by these fragments at the reaction target. It is found that 13±3% of the 7Be fragments are released in the 429 keV excited state, 7Be*, which gives direct experimental information on the ground state configuration of 8B. The longitudinal momentum distributions (p||) of the 7Be fragments have been measured, both inclusively and in coincidence with de-excitation γ -rays from 7Be*. The widths and cross sections of the respective p|| distributions are compared with calculations in a three-body cluster model.