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Title: New results on the halo structure of B-8
Authors: Smedberg, M. H., Baumann, T., Aumann, T., Axelsson, L., Bergmann, U., García Borge, María José, Cortina-Gil, D., Fraile, Luis M., Geissel, H., Grigorenko, L., Hellström, M., Ivanov, M., Iwasa, N., Janik, R., Jonson, B., Lenske, H., Markenroth, K., Münzenberg, G., Nilsson, T., Richter, Achim W., Riisager, K., Scheidenberger, C., Schrieder, G., Schwab, W., Simon, H., Sitar, B., Strmen, P., Sümmerer, K., Winkler, M., Zhukov, M. V.
Keywords: Unstable nuclei
Breakup reactions
Momentum distributions
One-proton removal cross section
Nuclear structure
[PACS] Breakup and momentum distributions
[PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19
Issue Date: 15-Apr-1999
Publisher: Elsevier
Abstract: The longitudinal momentum distribution of Be-7 fragments after fragmentation of B-8 and the one-proton removal cross section (σ(-1p)) in a carbon target were measured at 1440 MeV/u with the fragment separator FRS used as an energy-loss spectrometer. The results show a narrow momentum distribution with a FWHM value of 91 ± 5 MeV/c and a large cross-section, σ(-1p) = 98 ± 6 mb. Both these results support the interpretation of a spatially extended proton orbit forming a halo in the B-8 ground state. The momentum distribution and the: one-proton removal cross section are shown to be reproduced with a three-body wave function for B-8 where the target is treated as a black disc in the breakup process.
Description: 7 pages, 1 table, 3 figures.-- PACS nrs.: 25.60.Gc; 27.20.+n.
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ISSN: 0370-2693
???metadata.dc.identifier.doi???: 10.1016/S0370-2693(99)00245-2
Citation: Physics Letters B 452(1-2): 1-7 (1999)
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