Seminari INFN
STUDY OF THE 2H(alpha,gamma)6Li REACTION PRODUCING 6Li IN STANDARD BIG BANG NUCLEOSYNTHESIS
by
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Europe/Rome
Aula Conversi (Dip. di Fisica - Edificio G. Marconi)
Aula Conversi
Dip. di Fisica - Edificio G. Marconi
Description
The LUNA experiment at the Gran Sasso laboratory is devoted to measure nuclear cross sections relevant in astroparticle physics, by using the unique accelerator in the world operating underground. This presentation is centered on the measurement of the 2H(α,γ)6Li reaction, that is the leading process to produce the primordial 6Li. Because of its very low cross section, the previous measurements were done at energies greater than 700 keV, making the calculation of primordial 6Li abundance affected by a large uncertainty. For the first time, the LUNA collaboration has studied this reaction at BBN energies (40 keV < Ecm < 300 keV) thus giving a solid experimental footing to calculate the primordial 6Li abundance. The experimental tecnique and the preliminary results will be shown.