Three-body Halos. IV. Momentum Distributions after Fragmentation

Abstract

Momentum distributions of particles from nuclear break-up of fast three-body halos are calculated incorporating effects of final state interactions. The same two-body interactions between the particles are used to calculate both the ground state structure and the final state of the reaction processes. The ground state wave function reproduces size and energy of the halo nucleus. First we give a general and detailed description of the method. Then we investigate the effect of final state interactions in neutron removal and core break-up reactions for one- and two-dimensional momentum distributions. We compute specifically core and neutron momentum distributions from 11Li fragmentation and compare those with available experimental data. We conclude that 11Li must have a neutron-core relative state containing a p-state admixture of 20\%-30\%. The fragmentation data also strongly suggest that 10Li has an s-state at about 50 keV and a p-state around 500 keV.

21 pages, LaTeX file, 11 postscript figures using epsf.sty

References in corpus (3)

• Three-Body Halos. II. from Two- to Three-Body Asymptotics
• Three-body halos. III. Effects of finite core-spin
• Momentum Distributions of Particles from Three--Body Halo Fragmentation: Final State Interactions

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• Spin-dependent effective interactions for halo nuclei
• Comprehensive calculations of three--body breakup cross sections
• Three-body structure of ${}^{19}$B: Finite-range effects in two-neutron halo nuclei
• Four-body DWBA calculations of the Coulomb breakup of 6He
• Few-body structures in the mirror nuclei, ${}^{11}$O and ${}^{11}$Li
• Three-body Faddeev Calculation for 11Li with Separable Potentials
• Comment on "New modes of halo excitations in the 6He nucleus"
• Uncorrelated scattering approximation for the scattering and break-up of weakly bound nuclei on heavy targets
• Momentum distributions and reaction mechanisms for breakup of two--neutron halos
• Dineutron clusters in ${}^7$He and ${}^8$He structure