# Cross section measurements of the Big Bang nucleosynthesis reaction D($\alpha,gamma)^6Li$ by Coulomb dissociation of $^6Li$

Abstract : The possibility that big-bang nucleosynthesis (BBN) may produce nontrivial amounts of 6Li is under study since the recent observations of this element in old halo stars. However, the interpretation of these observations needs a precise knowledge of the reaction rate of D(alpha, gamma)6Li which, at present, is extremely uncertain (a factor of 20) at the energies of astrophysical interest (Ecm <= 300 keV). This uncertainty originates from difficulties in both theoretical estimates and experimental determinations of the D(alpha, gamma)6Li capture reaction cross section. New measurements of the cross section of D($\alpha, gamma$)6Li reaction using Coulomb dissociation of 6Li at 150 A MeV have been performed recently at GSI. The results will be compared to previous measurements and theoretical calculations.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00147216
Contributor : Suzanne Robert <>
Submitted on : Wednesday, May 16, 2007 - 11:05:53 AM
Last modification on : Wednesday, September 16, 2020 - 4:17:31 PM

### Citation

F. Hammache, D. Galaviz, K. Sümmerer, S. Typel, F. Attallah, et al.. Cross section measurements of the Big Bang nucleosynthesis reaction D($\alpha,gamma)^6Li$ by Coulomb dissociation of $^6Li$. International Conference on Frontiers in Nuclear Structures, Astrophysics and Reactions - FINUSTAR 2005, Sep 2005, Isle of Kos, Greece. pp.21-25, ⟨10.1063/1.2200893⟩. ⟨in2p3-00147216⟩

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