1Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2China Institute of Atomic Energy, Beijing 102413
Halo Effect on Direct Neutron Capture Process
LIU Zu-Hua1,2;ZHOU Hong-Yu1
1Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2China Institute of Atomic Energy, Beijing 102413
Abstract： We calculate the capture cross sections of the 10Be(n,γ) 11Be reaction by means of the asymptotic normalization coefficient method and demonstrate the halo effects on the capture cross sections for the direct radiative neutron capture where a p-, s- or d-wave neutron is captured into an s-orbit or p-orbit in 11Be by emitting an E1 γ-ray, respectively. The result shows that the enormous enhancement of the capture cross section is just due to the large overlap of the incident neutron wave with the extended tail of the halo, which is clearly illustrated by the reduced transition amplitude function.
2004, Vol. 21 
