  The astrophysically important 3He(a,g)7Be reaction was studied at high
energies where the available experimental data are in contradiction. A thin
window 3He gas cell was used and the cross section was measured with the
activation method. The obtained cross sections at energies between Ec.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.
