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Open Access item Halo structure of Be-14

Authors: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.
Keywords:Neutron-rich nuclei, Cross-section, Momentum distributions, Li-11, Dissociation, Spectroscopy, Radii
Issue Date:22-Jan-2001
Publisher:American Physical Society
Series/Report no.:Physical Review Letters 86: 600-603 (2001)
Abstract: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.
Description:4 pages, 3 figures.-- PACS nrs.: 27.20.+n, 24.30.Gd, 25.60.Dz, 25.60.Gc.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevLett.86.600
Appears in Collections:(CFMAC-IEM) Artículos

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