Other
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvc..53.2486k&link_type=abstract
Physical Review C (Nuclear Physics), Volume 53, Issue 5, May 1996, pp.2486-2495
Other
8
Transfer Reactions, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, 6<=A<=19
Scientific paper
In a neutron-rich, α-rich environment that could arise during a supernova explosion the reaction chain 4He(αn,γ)9Be(α,n)12C dominates the creation of carbon, which leads to the creation of heavier elements in the subsequent r process [S. E. Woosley and R. D. Hoffman, Astrophys. J. 395, 202 (1992); B. S. Meyer, G. J. Matthews, W. M. Howard, S. G. Woosley, and R. D. Hoffman, ibid. 399, 656 (1992); W. M. Howard, S. Goriely, M. Rayet, and M. Arnould, ibid. 417, 713 (1993)]. For this reason the excitation function of the reaction 9Be(α,n)12C has been measured in the energy range from Eα=366 keV up to 3552 keV (corresponding Ec.m.=254-2450 keV in the center-of-mass system) to obtain consistent data in the whole range, which were lacking in the literature. The measurements have been performed with a 4π detector and the yield contributions of the n0 and n1 neutron group could be resolved. Solid metallic targets of thickness 430 Å (7.75 μg/cm2) and 650 Å (11.72 μg/cm2) were used. Reaction rates and an analytic expression for them have been evaluated for 0.001<=T9<=10.
Barth St.
Denker Andrea
Drotleff H. W.
Hammer Wolfgang J.
Knee H.
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