NONEQUILIBRIUM COSMOLOGICAL NUCLEOSYNTHESIS OF LIGHT-ELEMENTS - CALCULATIONS BY THE MONTE-CARLO METHOD

Formation of light nuclei (Li-6, Li-7, and Be-7) in the interactions of He-4 nuclei with nonequilibrium fluxes of D, T, He-3, and He-4 nuclei produced in elastic collisions and in the dissociation of He-4 induced by the products of decay of metastable objects in the early Universe is studied by the Monte Carlo method. The dependences of the Li-6, Li-7, and Be-7 yields on the parameters of the analytic approximation of the experimental data on energy distributions of secondary nuclei formed in the N(NBAR)-induced dissociation of He-4 are analyzed. Conclusions that are made about the admissible parameters of hypothetical sources of nonequilibrium particles on the basis of observed abundances of lithium and beryllium are shown to depend only slightly on uncertainties in the nuclear-physical data.