CROSS-SECTIONS AND REACTION-RATES OF D-8 REACTIONS INVOLVED IN BIG-BANG NUCLEOSYNTHESIS(LI)

We have measured angular distributions of the H-2(Li-8, Li-7)H-3 and H -2(Li-8, Be-9)n reations at E(c.m.) = 1.5 to 2.8 MeV using an Li-8-rad ioactive-beam technique. Astrophysical S-factors and reaction rates we re calculated from the measured cross sections. Although the H-2(8Li, Be-9)n cross section is small, it can contribute to Be-9 synthesis, Th e H-2(Li-8, Li-7)H-3 reaction has a sufficiently large cross section t o destroy Li-8, which may decrease the synthesis of heavier elements. No products from the H-2(Li-8, Li-9)p reaction were detected. We also present the results of calculations using the inhomogeneous model of p rimordial nucleosynthesis in several regions of parameter space.