Abstract
Angular distributions in the barycentric coordinate system are presented for 24 charged-particle emissions from , , and interactions. These have been integrated, and the resulting total cross sections are tabulated. The total cross-section sums for a given projectile target combination are in reasonable agreement with theoretical estimates based on barrier penetration with nuclear radii given by with F. The largest total cross sections measured are approximately 40× . The angular distributions from and are symmetrical about 90° by necessity, those from are, in general, asymmetric and difficult to reconcile with a simple compound-nucleus interpretation of the reactions. Most of the intense particle emissions are cases in which the residual nucleus can be formed by capturing a deuteron or an alpha from , or by capturing an alpha from . To produce high cross sections these captures must be with between the reacting clusters. The evidence supports the hypothesis that a prominent but not necessarily exclusive reaction mechanism is for one of the Li-Li reacting partners to be distorted into "reacting clusters," consisting of an cluster from either of the lithiums, and a deuteron cluster from or a triton cluster from .
- Received 22 August 1962
DOI:https://doi.org/10.1103/PhysRev.129.791
©1963 American Physical Society