Probing the potency of O-16 as a neutron poison with the 20Ne(d,p) reaction
16O acts as a neutron poison for the s-process. The neutrons absorbed by 16O can be freed by the 17O(α,n)20Ne reaction which competes with the 17O(α,γ)21Ne reaction. Detailed information about 21Ne can help to constrain how many neutrons are recovered. We have used the 20Ne(d,p)21Ne reaction to obtain information about neutron widths, spins and parities of 21Ne levels.