Light element abundances. Impact of deuteron induced reaction of the primordial abundances and a new prescription for considering star formation in cosmological simulations

We investigate the 10B + d reaction in the energy range of the incident particle EdCMS from 100 to 260 keV and determine the S-factors and the angular distributions of the proton- and the α-channels. The particle-telescope technique is applied to measure the three α-particle break-up. The measured energy range is sufficient to determine the impact of this reaction on the primordial abundances of light elements. The rates of the 10B(d,p)11B and the 10B(d,α)8Be reactions are calculated. The rates of other deuteron-induces reactions which are also related to the production and destruction of beryllium, boron, and carbon are estimated. We apply the approximation of quasi-static equilibrium to assess the impact of deuteron-induced reactions. The considered reactions have no impact on the primordial abundances except for the 10B(d,n)11C reaction. It changes the 11B abundance at a 10% level. (orig.)