The Halo of 14Be
M. Labiche, N. A. Orr, F. M. Marques, J. C. Angelique, L. Axelsson, B. Benoit, U. C. Bergmann, M. J. G. Borge, W. N. Catford, S. P. G. Chappell, N. M. Clarke, G. Costa, N. Curtis, A. D'Arrigo, E. de Goes Brennand, O. Dorvaux, G. Fazio, M. Freer, B. R. Fulton, G. Giardina, S. Grevy, D. Guillemaud-Mueller, F. Hanappe, B. Heusch K. L. Jones, B. Jonson, C. Le Brun, S. Leenhardt, M. Lewitowicz, M. J. Lopez, K. Markenroth, A. C. Mueller, T. Nilsson, A. Ninane, G. Nyman, F. de Oliveira, I. Piqueras, K. Riisager, M. G. Saint Laurent, F. Sarazin, S. M. Singer, O. Sorlin, L. Stuttge
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 2s1/22 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.
Create a lesson
Related papers
Probing high-momentum components in 16O via zero-degree (p,d) cross-section ratios
FRS Experiment Collaboration, X. Wang, H. J. Ong et al.
Double-differential neutron-induced cross sections on Fe-nat at GANIL-NFS
L. de Arruda, D. Tarrío, X. Ledoux et al.
Event-by-event net-charge fluctuations in pp, OO, Ne-Ne, and Pb-Pb collisions with ALICE at the LHC
Nida Malik
Charge exchange reactions with central and tensor interactions and nuclear matrix elements associated with double-beta-decay neutrinos and astro neutrinos
Hiroyasu Ejiri, Yoritaka Iwata
First Measurement of Compton Scattering on 3He at HIγS
J. Zhou, E. Mancil, M. W. Ahmed et al.
Evolution of high-spin states in neutron-rich 195-202Au isotopes approaching the N=126 shell closure
Y. Cho, Y. H. Kim, A. Navin et al.