Cross section measurements of the Big Bang nucleosynthesis reaction D(α,γ)6Li by Coulomb dissociation of 6Li

被引:0
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作者
Hammache, F. [1 ]
Galaviz, D. [1 ]
Suemmerer, K. [1 ]
Typel, S. [1 ]
Attallah, F. [1 ]
Caamano, M. [1 ]
Coc, A. [1 ]
Cortina, D. [1 ]
Geissel, H. [1 ]
Hellstrom, M. [1 ]
Iwasa, N. [1 ]
Kiener, J. [1 ]
Koczon, P. [1 ]
Kohlmeyer, B. [1 ]
Schwab, E. [1 ]
Schwarz, K. [1 ]
Schdmann, F. [1 ]
Senger, P. [1 ]
Sorlin, O. [1 ]
Tatischeff, V. [1 ]
Thibaud, J. P. [1 ]
Uhlig, F. [1 ]
Wagner, A. [1 ]
Walus, A. [1 ]
机构
[1] Univ Paris 11, Inst Phys Nucl, IN2P3, F-91406 Orsay, France
关键词
primordial nucleosynthesis; Li-6; Coulomb dissociation;
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中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The possibility that big-bang nucleosynthesis (BBN) may produce nontrivial amounts of Li-6 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)(6) Li which, at present, is extremely uncertain (a factor of 20) at the energies of astrophysical interest (E-cm < 300 keV). This uncertainty originates from difficulties in both theoretical estimates and experimental determinations of the D(alpha,gamma)Li-6 capture reaction cross section. New measurements of the cross section of D(alpha,gamma)Li-6 reaction using Coulomb dissociation of Li-6 at 150 A MeV have been performed recently at GSI. The results will be compared to previous measurements and theoretical calculations.
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页码:21 / +
页数:2
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