Cross section for the primordial reaction 8Li(p,n)8Be (g.s.) at Ec.m.=1.5 MeV

Physics – Nuclear Physics

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Nucleon-Induced Reactions, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

The differential cross section for the primordial reaction 8Li(p,n)8Be(g.s.) has been determined at Ec.m.=1.5 MeV in the c.m. angular range 38° to 90° by use of the radioactive nuclear beam facility at the University of Notre Dame which utilizes a superconducting solenoid lens system designed at the University of Michigan, and a 8Be detection technique developed at the Florida State University. A 8Li beam of approximately 107 pps is used to infer a total cross section of 21+/-2 mb, with a 20% absolute cross section uncertainty. This total cross section is a factor of two smaller than a conventional Hauser-Feshbach calculation and it is also much smaller than that of some other 8Li burning reactions.

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