Nucleosynthesis of light elements using triton beams

Recent theoretical studies of primordial nucleosynthesis have pinpointed the light nuclides as crucial to the testing of our understanding of the processes of primordial nucleosynthesis. Especially the primordial abundances of nuclides could distinguish between the standard and inhomogeneous models. If we look the subset of the nuclides and the reactions between them which characterize primordial nucleosynthesis (up to 11 B) we observe the important potential role of tritons in reactions as : 7 Li (T,n) 9 B and 9 B (T,n) 11 B. So, it is necessary to measure these cross sections in very accurate conditions. The technical conditions required for such an experiment (Etritons ≤ 500 KeV, exceptional beam stability, resolution and reproducibility, large intensities, very low background, special dedicated spectroscopic facilities) are presented. Possibilities to use for such a program the 3.5 MeV Van de Graaff of CERI Orleans and the new Disktron accelerator of Cyclotron Laboratory Bucharest are discussed. (Author)