Abstract
Recent experimental cross sections for the reaction (d,2n,m are in marked disagreement with the standard statistical-model analysis. We have, therefore, analyzed the data with an approach that emphasizes direct-reaction contribution to the cross section. This is done in two steps. In the first step, the compound-nucleus formation cross section is defined such that only the internal part of the target nucleus is allowed to absorb the deuteron, thus leading to the formation of . The contribution of the external part is interpreted as going to direct reaction. The calculation of the internal part then proceeds by statistical evaporation of two neutrons to produce . In the second step, the dominant part of the direct reaction, i.e., the deuteron breakup, followed by the capture of the proton, is considered. This quantum mechanical, breakup fusion process forms , which then evaporates one neutron to produce . The sum of the cross sections from these two processes fits the data quite well. The consistency of this twofold treatment is confirmed by our finding that the total reaction cross section for the deuteron is accounted for by summing the above two fusion cross sections with the additional direct-reaction cross sections that do not contribute to the production of .
- Received 24 November 1986
DOI:https://doi.org/10.1103/PhysRevC.35.2077
©1987 American Physical Society