Nuclear weak interaction rates in primordial nucleosynthesis

Understand

We calculate the weak interaction rates of selected light nuclei during the epoch of Big Bang Nucleosynthesis (BBN), and we assess the impact of these rates on nuclear abundance flow histories and on final light element abundance yields.

• We consider electron and electron antineutrino captures on 3He and 7Be, and the reverse processes of positron capture and electron neutrino capture on 3H and 7Li.
• We also compute the rates of positron and electron neutrino capture on 6He.
• We calculate beta and positron decay transitions where appropriate.