Abstract
The cross-section of 8 Li( $\alpha $ ,n)11 B has been measured at $E_{\rm cm}$ = 1.25 MeV to be $\sigma (E) = 500$ mb using novel techniques, i.e. a 8 Li radioactive ion beam produced at the tandem in Catania in combination with a 4 He gas cell and a $4\pi $ neutron detector. The value is in fair agreement with previous work strengthening the model of inhomogeneous Big Bang nucleosynthesis.
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