Experimental evidence for the B-8 ground state configuration

Cortina-Gil, D.; Markenroth, K.; Attallah, F.; Baumann, I.; Benlliure, J.; Borge, M. J. G.; Chulkov, L. V.; Pramanik, U. D.; Fernandez-Vazquez, J.; Forssen, C.; Fraile, L. M.; Geissel, H.; Gerl, J.; Hammache, F.; Itahashi, K.; Janik, R.; Jonson, B.; Karlsson, S.; Lenske, H.; Mandal, S.; Meister, M.; Mocko, X.; Munzenberg, G.; Ohtsubo, T.; Ozawa, A.; Parfenova, Y.; Pribora, V.; Riisager, K.; Scheit, H.; Schneider, R.; Schmidt, K.; Schrieder, G.; Simon, H.; Sitar, B.; Stolz, A.; Strmen, P.; Summerer, K.; Szarka, I.; Wan, S.; Weick, H.; Zhukov, M.

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Experimental evidence for the B-8 ground state configuration

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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, I., Benlliure, J., Borge, M. J. G., et al. (2002). Experimental evidence for the B-8 ground state configuration. Physics Letters B, 529(1-2), 36-41.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-83A1-B

Abstract

The Be-7 fragments produced in one-proton removal from relativistic B-8 nuclei of 936 MeV/nucleon in a carbon target have been detected in coincidence with gamma rays emitted by these fragments at the reaction target. It is found that 13 +/- 3% of the Be-7 fragments are released in the 429 keV excited state, Be-7*, which gives direct experimental information on the ground state configuration of B-8. The longitudinal momentum distributions (p(parallel to)) of the Be-7 fragments have been measured, both inclusively and in coincidence with de-excitation gamma-rays from Be-7*. The widths and cross sections of the respective p(parallel to) distributions are compared with calculations in a three-body cluster model. (C) 2002 Elsevier Science B.V. All rights reserved.