The Halo of 14Be
Nuclear Experiment
2007-05-23 v1
Abstract
The two-neutron halo nucleus 14Be has been investigated in a kinematically complete measurement of the fragments (12Be 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 characteristic of a halo were observed and the electromagnetic (EMD) contributions deduced. Comparison with three-body model predictions indicate that the halo wavefunction contains a large 2s1/2^2 admixture. The EMD invariant mass spectrum exhibited a relatively narrow structure near threshold (Edecay=1.8+/-0.1 MeV, Gamma = 0.8+/-0.4 MeV) consistent with a soft-dipole excitation.
Keywords
Cite
@article{arxiv.nucl-ex/0006003,
title = {The Halo of 14Be},
author = {M. Labiche and N. A. Orr and F. M. Marques and J. C. Angelique and L. Axelsson and B. Benoit and U. C. Bergmann and M. J. G. Borge and W. N. Catford and S. P. G. Chappell and N. M. Clarke and G. Costa and N. Curtis and A. D'Arrigo and E. de Goes Brennand and O. Dorvaux and G. Fazio and M. Freer and B. R. Fulton and G. Giardina and S. Grevy and D. Guillemaud-Mueller and F. Hanappe and B. Heusch K. L. Jones and B. Jonson and C. Le Brun and S. Leenhardt and M. Lewitowicz and M. J. Lopez and K. Markenroth and A. C. Mueller and T. Nilsson and A. Ninane and G. Nyman and F. de Oliveira and I. Piqueras and K. Riisager and M. G. Saint Laurent and F. Sarazin and S. M. Singer and O. Sorlin and L. Stuttge},
journal= {arXiv preprint arXiv:nucl-ex/0006003},
year = {2007}
}
Comments
17 pages, 3 figures