Neutron halo in¹⁴B studied via reaction cross sections

Abstract

Abstract. Reaction cross sections (σ R ) for the neutron-rich nucleus 14 B on Be, C, and Al targets have been measured at several energies in the intermediate energy range of 45−120 MeV/nucleon. The present experimental σ R show a significant enhancement relative to the systematics of stable nuclei. The nucleon density distribution was deduced through the fitting procedure with the modified Glauber calculation. The necessity of a long tail in the density distribution was found, which is consistent with the valence neutron in 2s 1/2 orbital with the small empirical one-neutron separation energy in 14 B.

Study of the Exotic Structure of Neutron-Rich 14B and 17C Nuclei Using the Binary Cluster Model

“…Figure 2 illustrates the contributions of the core nucleons (green curve) and the valence neutron (blue curve) to the matter density (dashed-dot red curve) for halo nuclei 14 B and 17 C obtained by the GS (left part) and HO (right part) parameterizations along with their experimental matter density (gray area) is taken from Refs. [18,19]. The top and bottom panels correspond to halo nuclei 14 B and 17 C, respectively.…”

“…This change is attributed to the difference in the center of mass correction, which depends on the mass number and the size parameter. The calculated at high and low energies for 14 B+ 12 C and 17 C+ 12 C systems obtained by the Glauber model with OLA along with experimental data [17][18][19] are plotted in Figure 6 and listed in Table 3. The open red and filled blue circle symbols are the calculated and experimental results, consecutively.…”

Microscopic analysis of quasielastic scattering and breakup reactions of the neutron-rich nuclei Be12,14

“…On the contrary, the dominance of the d-configuration in the N = 8 shell in 12 Be was strongly revealed from the breakup reaction on a proton target at intermediate energy [38]. Also, different measurements of reaction cross sections of 14 Be on protons and carbon target at about 41 and 76 MeV/nucleon [39], on Be, C, and Al targets at several energies in the range of 45-120 MeV/nucleon [40], as well as at relativistic energies [41], allowed one to deduce the matter density distribution of this two-neutron halo nucleus supporting the s-wave dominance in the ground-state density of 14 Be. The fact that the ground-state wave function of 14 Be includes a strong 2s 1/2 admixture has been confirmed in the experiment of Labiche et al [42], in which they studied the dissociation of 14 Be at 35 MeV/nucleon on carbon and lead targets in a kinematically complete measurement.…”