Speaker
Mr
Steffen Turkat
(IKTP, TU Dresden)
Description
The $^3$He($\alpha,\gamma$)$^7$Be reaction affects the nucleosynthesis of $^7$Li as well as the predicted solar $^7$Be and $^8$B 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$\,\approx\,$1$\,$MeV.
There are multiple and overlapping precise experimental data sets at E$\,$=$\,$0.7$\,$-$\,$1.3$\,$MeV.
Any extrapolation of this precise data down to a unique data set from an experiment of the LUNA collaboration at E$\,$=$\,$0.09$\,$MeV$\,$-$\,$0.13$\,$MeV has to deal with the fact that at E$\,$=$\,$1$\,$MeV, the capture is possible both from s-wave incident particles and from d-wave incident particles, whereas at 0.1$\,$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 $^3$He($\alpha,\gamma$)$^7$Be reaction was done using a setup of four HPGe detectors at various angles and shall be presented here.
Primary author
Mr
Steffen Turkat
(IKTP, TU Dresden)
Co-authors
Mr
Daniel Bemmerer
(HZDR)
Mr
Kai Zuber
(IKTP, TU Dresden)
Mrs
Lisa Hübinger
(HZDR)
Mr
Sebastian Hammer
(HZDR Dresden-Rossendorf)
