Activation measurement of the he3(α,γ)be7 reaction cross section at high energies

Abstract The astrophysically important He 3 ( α , γ ) Be 7 reaction was studied at high energies where the available experimental data are in contradiction. A thin window 3 He gas cell was used and the cross section was measured with the activation method. The obtained cross sections at energies between E c . m . = 1.5 and 2.5 MeV are compared with the available data and theoretical calculations. The present results support the validity of the high energy cross section energy dependence observed by recent experiments.