Speaker
Steffen Turkat
(IKTP, TU Dresden)
Description
The 3He(a,g)7Be reaction affects the nucleosynthesis of 7Li as well as the predicted solar 7Be and 8B neutrino fluxes. It is being studied over a wide energy range at the Rossendorf 3 MV Tandetron accelerator, with a focus on the measurement of the gamma-ray angular distribution at E=1 MeV.
There are multiple and overlapping precise experimental data sets at E=0.7-1.3 MeV. Any extrapolation of this precise data down to a unique data set from an experiment of the LUNA collaboration at E=0.09-0.13 MeV has to deal with the fact that at E=1 MeV, the capture is possible both from s-wave incident particles and from d-wave incident particles, whereas at 0.1 MeV and lower the d-wave component plays no role due to the angular momentum barrier. A measurement of the angular distribution of the emitted gamma-rays at E=1 MeV may constrain the relative contributions of s-wave and d-wave components at high energies and thus enable a better comparison between the high-energy and the low-energy data points.
Data from a first run for the angular distribution of the emitted prompt gamma-rays in the 3He(a,g)7Be reaction was done using a setup of four HPGe detectors at various angles and shall be presented here.
Primary author
Steffen Turkat
(IKTP, TU Dresden)
