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Título : Halo structure of Be-14
Autor : Labiche, M., Orr, N. A., Marqués, F. M., Angélique, J. C., Axelsson, L., Benoit, B., Bergmann, U. C., García Borge, María José, Catford, W. N., Chappell, S. P. G., Clarke, N. M., Costa, G., Curtis, N., D’Arrigo, A., Brennand, E. de Góes, Dorvaux, O., Fazio, G., Freer, M., Fulton, B. R., Giardina, G., Grévy, S., Guillemaud-Mueller, D., Hanappe, F., Heusch, B., Jones, K. L., Jonson, B., Le Brun, C., Leenhardt, S., Lewitowicz, M., López, M. J., Markenroth, K., Mueller, A. C., Nilsson, T., Ninane, A., Nyman, G., Oliveira, F. de, Piqueras, Inmaculada, Riisager, K., Saint-Laurent, M. G., Sarazin, F., Singer, S. M., Sorlin, O., Stuttgé, L.
Palabras clave : Neutron-rich nuclei
Cross-section
Momentum distributions
Li-11
Dissociation
Spectroscopy
Radii
Fecha de publicación : 22-Jan-2001
Editor: American Physical Society
Citación : Physical Review Letters 86: 600-603 (2001)
Resumen: The two-neutron halo nucleus Be-14 has been investigated in a kinematically complete measurement of the fragments (Be-12 and neutrons) produced in dissociation at 35 MeV/nucleon on C and Pb targets. Two-neutron removal cross sections, neutron angular distributions, and invariant mass spectra were measured, and the contributions from electromagnetic dissociation (EMD) were deduced. Comparison with three-body model calculations suggests that the halo wave function contains a large nu(2s(1/2))(2) admixture. The EMD invariant mass spectrum exhibited enhanced strength near threshold consistent with a nonresonant soft-dipole excitation.
Descripción : 4 pages, 3 figures.-- PACS nrs.: 27.20.+n, 24.30.Gd, 25.60.Dz, 25.60.Gc.
Versión del editor: http://dx.doi.org/10.1103/PhysRevLett.86.600
URI : http://hdl.handle.net/10261/9810
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.86.600
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