On the Determination of the 7 Be(n, α) 4 He Reaction Cross Section at BBN Energies

Abstract

7 Be destruction channels are currently a matter of study because of their influence on the 7 Li cosmological abundances. Here, we determine the cross section of the (n, α ) reaction by using Trojan Horse experimental data for the 7 Li(p, α ) 4 He reaction and correcting for Coulomb effects. The deduced 7 Be(n, α ) 4 He data overlap with the Big Bang nucleosynthesis energies and the deduced reaction rate allows us to evaluate the corresponding cosmological implications.