Neutron correlations in ~6He viewed through nuclear break-up

摘要

The nuclear break-up of ~6He on a ~(208)Pb target was studied at 20AMeV using a secondary beam of 6He produced by the SPIRAL facility at GANIL. α-particles were detected in coincidence with two neutrons with a large angular coverage and the reaction mechanism was identified. From the distribution of the relative angles between the two neutrons the correlation function was extracted. It shows a strong correlation at small relative angles attributed to the contribution of the di-neutron configuration of 6He.