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 o f He-4 nuclei with nonequilibrium fluxes of D, T, He-3, and He-4 nucle i produced in elastic collisions and in the dissociation of He-4 induc ed by the products of decay of metastable objects in the early Univers e is studied by the Monte Carlo method. The dependences of the Li-6, L i-7, and Be-7 yields on the parameters of the analytic approximation o f the experimental data on energy distributions of secondary nuclei fo rmed in the N(NBAR)-induced dissociation of He-4 are analyzed. Conclus ions that are made about the admissible parameters of hypothetical sou rces of nonequilibrium particles on the basis of observed abundances o f lithium and beryllium are shown to depend only slightly on uncertain ties in the nuclear-physical data.