Cross sections and reaction rates of d + 8Li reactions involved in Big Bang nucleosynthesis
Abstract
We have measured angular distributions of the 2H( 8Li, 7Li) 3H and 2H( 8Li, 9Be)n reactions at Ec.m. = 1.5 to 2.8 MeV using an 8Li- radioactive-beam technique. Astrophysical S-factors and reaction rates were calculated form the measured cross sections. Although the 2H( 8Li, 9Be)n cross section is small, it can contribute to 9Be synthesis. The 2H( 8Li, 7Li) 3H reaction has a sufficiently large cross section to destroy 8Li, which may decrease the synthesis of heavier elements. No products from the 2H( 8Li, 9Li)p reaction were detected. We also present the results of calculations using the inhomogeneous model of primordial nucleosynthesis in several regions of parameter space.
- Publication:
-
Nuclear Physics A
- Pub Date:
- February 1995
- DOI:
- 10.1016/0375-9474(94)00484-5
- Bibcode:
- 1995NuPhA.584..315B
- Keywords:
-
- NUCLEAR REACTIONS 2H(8LI;
- 7LI);
- (8LI;
- 9BE);
- 9LI);
- ELAB = 8-14 MEV;
- MEASURED σ(E;
- θ);
- DEDUCED REACTION RATES