Momentum distributions and reaction mechanisms for breakup of two–neutron halos

Coulomb breakup of 11 Be and 19 C

We investigate the Coulomb part of the one-neutron removal cross section in breakup reactions of the neutron rich nuclei Be and C. Approximate Coulomb breakup amplitudes are derived from two distinct theoretical viewpoints. One of these uses an approximation to the distorted-wave Born approximation. The other assumes an adiabatic treatment of the projectile excitation to the low energy continuu...

Probing the halo structure of 19

We have measured the parallel momentum distributions of outcoming fragments in the one-neutron breakup of the odd-mass carbon isotopes C and B. Owing to their low neutron separation energies, the study of these nuclei is of particular interest regarding the appearance of the halo phenomenon. Discrepancies between experiment and theory observed for C and B indicate that their halos are not as pr...

Longitudinal Momentum Distributions of 8B and 19C: Signatures for One-Proton and One-Neutron Halos

Two-neutron removal reactions of He treated as a three-body halo

We formulate a method to compute breakup processes of three-body halo systems reacting with a target. The reaction between one of the particles and the target as well as the corresponding pairwise final state interactions are carefully treated. Both absorption and diffraction processes are included. Detailed differential and total cross sections are calculated for two-neutron (2n) removal from ...

Momentum distributions of particles from three-body halo fragmentation: Final state interactions.

Momentum distributions of particles from nuclear break-up of fast threebody halos are calculated consistently, and applied to 11Li. The same twobody interactions between the three particles are used to calculate the ground state structure and the final state of the reaction processes. We reproduce the available momentum distributions from 11Li fragmentation, together with the size and energy of...