EPJ Web of Conferences (Jan 2018)
The role of 14 MeV neutrons in light element nucleosynthesis
Abstract
The 14 MeV neutron induced nuclear reactions which might contribute to better understanding of so-called “cosmological lithium problem” have been discussed. The BBN theory predicted 7Li overestimated value could be lowered by 2n induced reactions on Li-isotopes and/or 7Be destruction via resonance in d+7Be→9B process. Proposals for 6Li+2n and 7Li+2n reactions cross section evaluations and measurements are discussed in some details. We discuss also a preliminary measurements of n-n coincidences from the 10B(n,2n)9B reaction with two neutron detectors placed outside the cone of 14 MeV tagged neutron beam. From the time-of-flight measurements and known geometry we deduce the neutron energies and calculate the 9B missing mass spectrum.
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